The case against patents can be summarized briefly: there is no empirical evidence that they serve
to increase innovation and productivity, unless the latter is identified with the number of patents awarded
– which, as evidence shows, has no correlation with measured productivity.
Federal Reserve Bank of St. Louis
Working Paper Series
The Case Against Patents
David K. Levine
Working Paper 2012-035A
FEDERAL RESERVE BANK OF ST. LOUIS
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The views expressed are those of the individual authors and do not necessarily reflect official positions of
the Federal Reserve Bank of St. Louis, the Federal Reserve System, or the Board of Governors.
Federal Reserve Bank of St. Louis Working Papers are preliminary materials circulated to stimulate
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cleared with the author or authors.
The Case Against Patents
Michele Boldrin and David K. Levine
First draft: January 29, 2012
This draft: June 29, 2012
The case against patents can be summarized briefly: there is no empirical evidence that they serve
to increase innovation and productivity, unless the latter is identified with the number of patents awarded
– which, as evidence shows, has no correlation with measured productivity. This is at the root of the
“patent puzzle”: in spite of the enormeous increase in the number of patents and in the strength of their
legal protection we have neither seen a dramatic acceleration in the rate of technological progress nor a
major increase in the levels of R&D expenditure – in addition to the discussion in this paper, see Lerner
 and literature therein. As we shall see, there is strong evidence, instead, that patents have many
negative consequences. Both of these observations, the evidence in support of which has grown steadily
over time, are consistent with theories of innovation that emphasize competition and first-mover
advantage as the main drivers of innovation and directly contradict “Schumpeterian” theories postulating
that government granted monopolies are crucial in order to provide incentives for innovation. The
differing predictive and explanatory powers of the two alternative classes of models persist when
attention is shifted to the historical evidence on the life-cycle of industries. The initial eruption of small
and large innovations leading to the creation of a new industry – from chemicals to cars, from radio and
TV to personal computers and investment banking – is seldom, if ever, born out of patent protection and
is, instead, the fruits of highly competitive-cooperative environments. It is only after the initial stages of
explosive innovation and rampant growth end that mature industries turn toward the legal protection of
patents, usually because their internal grow potential diminishes and the industry structure become
A closer look at the historical and international evidence suggests that while weak patent systems
may mildly increase innovation with limited side-effects, strong patent systems retard innovation with
many negative side-effects. Both theoretically and empirically, the political economy of government
operated patent systems indicates that weak legislation will generally evolve into a strong protection and
that the political demand for stronger patent protection comes from old and stagnant industries and firms,
not from new and innovative ones. Hence the best solution is to abolish patents entirely through strong
constitutional measures and to find other legislative instruments, less open to lobbying and rent-seeking,
to foster innovation whenever there is clear evidence that laissez-faire under-supplies it.
2. Theory and Practice of Patents and Innovation
There is little doubt that providing a monopoly as a reward for innovation increases the incentive
to innovate. There is equally little doubt that granting a monopoly for any reason has the many illconsequences
we associate with monopoly power – the most important and overlooked of which is the
strong incentive of a government granted monopolist to engage in further political rent-seeking to
preserve and expand his monopoly or, for those who do not yet have it, to try obtaining one. Said
differently: while the positive impact of patents is the straightforward partial equilibrium effect of
increasing to the monopolistic level the profits of the successful innovator, the negative one is the subtler
general equilibrium effect of reducing everybody else’s ability to compete while increasing for everyone
the incentive to wastefully lobby.
In the long run, though, even the positive partial equilibrium effect may be more apparent than
real: the existence of a large number of monopolies due to past patent grants reduces the incentives for
innovation as current innovators are subject to constant legal action and licensing demands from earlier
patent holders. The recent – and largely successful – efforts of Microsoft to impose a licensing fee on the
large and expanding Android phone market is but one case in point. With the exception of Motorola
Mobility all the handset manufactors have agreed to the fee, and Motorola has recently lost the first battle
– fought not in court but in the more receptive domain of the U.S. International Trade Commission.1
The basic problem with the patent system – the downstream-blocking effect of existing monopoly
grants on future innovation – is greatly increased because modern products are made up of so many
different components. The Microsoft-Motorola example is a good illustration as a licensing fee on
Android mobile phones is being charged by Microsoft soley over a patent involving the scheduling of
meetings – a trivial and rarely used feature of modern smart-phones. This is but one of many thousands of
patented “ideas” used in a modern smart-phone, and each owner of each patent potentially can charge a
licensing fee. Hence, the main dynamic general equilibrium effect of a patent system is to subject future
inventions to a gigantic hold-up problem: with many licenses to be purchased and uncertainty about the
ultimate value of the new innovation each patent holder, in raising the price of his “component”, imposes
an externality on other patent holders and so charges a higher than efficient licensing fee. Boldrin and
Levine  and Llanes and Trento  have explored the theory, many case-studies involving
patents – and other fractionated ownership problems – can be found in Heller ..
A second widely cited benefit of patent systems – although not so much in the economics
literature – is the notion that patents are a substitute for socially costly trade secrecy and improve
communication about ideas. From a theoretical point of view the notion that patents are a substitute for
trade secrecy fails even in the simplest model. If a secret can be kept for N years and a patent lasts M
1 Investigation Number 337-TA-744 May 18, 2012. Note that the patent in question is for “generating meeting
requests and group scheduling from a mobile device” – not what we ordinarily think of as “innovation” or
years then an innovator will patent exactly when N ? M . Hence, only those things will be patented for
which the secret would have emerged before the patent expired, while those for which the secret can be
kept will not be patented. The same remains true in more complex and realistic models such as that of
Boldrin and Levine , see also Ponce . It is also the case that modern “disclosure” in patents is
negligible – it is essentially impossible to build a functioning device or software program from a modern
patent application, a fact which is especially clear since some patented ideas do not – and cannot – work.
A case in point is the patent for moving information through the fifth dimension.2
A more subtle point is that secrecy may bias the type of inventive activity away from innovations
that are not easily kept secret to those that can be, viceversa for patents. There is historical evidence from
Moser [2004, 2005] in this direction. In 19th Century expositions of inventions, while countries without
patent systems had overall rates of innovation similar to those with a patent system, they did specialize in
innovations which were more easily kept secret. How strong this bias would be if no countries had patent
systems – that is, whether it is true that patents encourage innovations that would not otherwise be made,
or if they just shift the location of innovation from country to country – is not known.
The related idea that patents somehow improve communication about ideas – a notion key to the
“public-private” partnership between governments and private research organization in which the
government funds the research and then gives the private organization a monopoly over anything
developed in the course of research – is backed neither by theory or evidence. It is impossible to study the
history of innovation without recognizing that inventors and innovators exchange ideas as a matter of
course and that secrecy occurs, in those cases in which it occurs, only in the final stages of an innovation
process, when some ambitious inventors hope to corner the market for a functioning device by patenting
it. A good case in point is that of the Wright brothers, who made a modest improvement in existing flight
technology which they kept secret until they could lock it down on patents, then used their patents both to
monopolize the U.S. market and to prevent innovation for nearly 20 years. This is discussed in Shulman
. The role that Marconi and his patent played in the development of the radio is altogether similar –
see Hong  – as are innumerable others. At the opposite extreme we have, again among many, the
example of the Cornish steam engine discussed in Nuvolari [2004a, b]. Here engineers exchanged nonpatented
ideas for decades in a collaborative effort to improve efficiency. The modern and highly
successful open source software movement is a more contemporary example of how collaboration and
exchange of ideas thrives absent intellectual property. How much public benefit of the various patented –
and never-the-less secret – pieces of the Microsoft operating system has occurred?
On the other side of the coin, the rationale for patent systems is weak. In most industries the first
mover advantage and the competitive rents it induces are substantial without patents. Again: the smartphone
industry – laden as it is with patent litigation – is a case in point.3 Apple derived enormous profits
2 U.S. Patent 6,025,810.
3 The history of the various smart-phones is documented, for example, in Wikipedia.
in this market before it faced any substantial competition. The first iPhone was released on June 29, 2007.
The first serious competitior, the HTC Dream (using the Android operating system) was released only on
October 22, 2008. By that time over 5 million iPhones had been sold, and sales soared to over 25 million
units during the subsequent year, while total sales of all Android based phones was less than 7 million. In
the tablet market the iPad still has no serious competitor despite having been introduced on April 10,
2010. While it is hard to prove this delayed imitation would have occurred also in the complete absence
of patents, it is a fact that Apple did not try to use patents to prevent the Android phones from coming
into its market and the subsequent “patents’ fight” has been taking place largely after 2010, something
that the Boldrin and Levine  model predicts. More to the point, companies typically instruct their
engineers developing products to avoid studying existing patents so as to be spared subsequent claims of
willful infringement, which raises the possibility of having to pay triple damages. Based on sworn
testimony by Google’s chief of Android development in Oracle vs. Google (see for example Niccolai
) the engineers that developed Android were unaware of Apple (or other) patents, and so were
unlikely to have been helped by them.4
How valuable financially, for Apple, was the delay in the Android phones entry? Based largely
on the fact that Apple has kept its first mover advantage in spite of a large imitative entry in this market,
the value of Apple stock – during a severe market downturn – has gone up by a factor of approximately
five. While there may have been some delay in competition due to Apple’s threat – since executed – of
patent litigation, the fact is that similar but less successful devices had been available for a number of
years before Apple finally cracked the market.
The market for software and hardware may be viewed as a somewhat special case. Generally the
fixed cost of producing software is low – although it is estimated that Apple spent 150 million USD
developing the iPhone. This, however, pales in comparison to the cost of developing new medicines –
which is estimated to have a present value of closer to 1 billion USD – the same way it does in front of
that for developing a new model of automobile, which is in the same range. Interestingly it is also true
that – according to both survey and anecdotal evidence – patents play an important role in encouraging
innovation in the pharmaceutical industry while playing a minor one in that of cars, insofar as new
components and even plants are often developed by consortia or joint-ventures of otherwise fiercely
competitive producers marketing different automobile’s brands. The relevance of patents in the
pharmaceutical industry – then, and contrary to “Schumpeterian” theories – is most likely not due to the
high fixed costs but rather the fact that disclosure in the case of drugs is more meaningful than in that of
cars and most other products. The chemical formula and the efficacy of the cure as established by clinical
trials are available to competitors essentially for free and it is the second (a public good, privately
produced due to a political choice) that accounts for about 80% of the initial fixed cost. On the other side,
4 Note also that these types of policies make something of a mockery of the idea that patents serve to make ideas
the downstream cost of monopoly pricing of pharmaceutical products is much higher for life-saving
drugs, and the cost of monopoly pricing of other pharmaceutical products is also quite high. Hence
various economists, holding differring views about intellectual property, have nevertheless argued that if
government intervention is indeed needed in this market a system of prizes would be far superior to the
existing system of monopolies.
To understand patents in practice – and in particular why the poorly named “Schumpeterian”
theories are not relevant to a proper understanding of either their effect upon, or the determinants of,
innovative activity – it is necessary to examine the lifecycle of industries (see for example Jovanovich and
McDonald  and Scherer ). Typically a new, hence innovative, industry begins with a
competitive burst of entries through which very many innovators try hard to get their products to market.
In these early stages, there are many firms bringing different versions of the new product to the market –
just think at the American auto industry in the early twentieth century or the software industry in the
1980s and 1990s – demand for the new product grows rapidly and the latter is also rapidly improved. The
price elasticity of demand is consequently high: what is important is not to dominate the market but rather
try to get your own products quickly to it and to reduce costs. What this means is that your cost-reducing
innovation is good for me in the same way that my cost-reducing innovation is good for you, hence let us
all imitate each other and compete in the market. As the industry matures, demand stabilizes and becomes
much less elastic; the scope for cost-reducing innovations decreases, the benefits of monopoly power
grow and the potential for additional product innovation also shrinks. Typically there is a “shake-out” in
which many firms either leave the industry or are bought out. The automobile industry is a classical
historical example but the much more recent “bursting” of the dotcom “bubble” is, in fact, one we may
recall better and that makes this point even more forcefully. At this stage rent-seeking does become
important and patents are widely used to inhibit innovation, prevent entry, and encourage exit. If we look
at patent litigation in practice – as is predicted by theories such as that of Boldrin and Levine  – it
takes place when innovation is low. The dead hand of dying institutions – Texas Instruments was famous
for this and now we have the example of Microsoft – gets hold of the industry as they attempt to tax
consumers, new entrants and any potential competitor. Far from being encouraged, when an industry
matures innovation is blocked by the ever increasing appeal to intellectual property protection on part of
It is somewhat conventional to think of welfare losses from distortions as small – the well known
arguments about the small cost of the business cycle and of the general idea that welfare triangles due to
monopoly power are small, being paradigmatic cases in point. With the monopolies of patents the
opposite is the case. The conventional view starts with competitive equilibrium and observes that welfare
losses from small price variations are quadratic as a function of the price, hence grow very slowly as the
price increases. In the case of full monopoly – as is the case with patents – we are not interested in small
price deviations from competition but rather we are interested in pricing near the top of the profit
function. Witness for example the fact that patented pharmaceutical products often sell for hundreds of
times the marginal cost of production as some astonishing pricing differences between the US and the
European markets show. Here social loss increases nearly linearly with prices, while the deviation of
profits from the maximum are quadratic. Hence small price increases have a only a small effect on profits
– although still worthwhile from the perspective of the monopolist – with substantial social loss. It is
impossible to observe the behavior of modern IP monopolists without recalling this theoretical prediction.
Most of the copyright wars revolve around measure to prevent piracy, empirically a relatively minor
factor as far as profits of media corporations are concerned (see for example Sinha, Machado, Sellman
, Danaher, Dhanasobhon, Smith and Rahul, , Sanchez ). In the case of patents, and
particularly pharmaceutical patents, the situation is even more severe. We have made mention of the loss
of human life due to the pricing of AIDS drugs. More revealing is the empirical study of the Quinolones
family of drugs (Chaudhuri, et al. ). It measures the economic consequences to India of the
introduction of pharmaceutical patents for this family of drugs and concludes that the consequence to
third world India will be nearly 300 million USD in welfare losses – while the gain to the first world
pharmaceutical companies will be less than 20 million USD.
The cost of litigating patents is not insubstantial either. Bessen and Meurer  used stock
market event studies to estimate the cost of patent litigation: they estimate that during the 1990s it rose
substantially until at the end of the period it constitutes nearly 14% of total R&D costs. A related but
more difficult to quantify phenomenon is the rise of uncertainty caused by the legal system. A case in
point are the NTP Inc. patents that were used to threaten the Blackberry network with a shutdown. In
2006, posed on the edge of a cliff, Research in Motion, the producer of Blackberry, agreed to pay $ 612.5
million to license the patent in question from NTP. The patent was later invalidated by the court – but
Blackberry of course did not get their money back. Further details about this and other NTP-induced
cases are available on the Wikipedia’s page about NTP. Here the bad behavior of a single judge cost
Blackberry more than half a billion dollars. In this setting it is no surprise that patent trolls hope to get
Arms Races and Patent Trolls
Patenting has exploded over the last decades. In 1983 in the U.S. 59,715 patents were issued
against 105,704 applications; by 2003, 189,597 patents were issued against 355,418 applications and,
even in a slow growth year like 2010, 244,341 new patents were approved. In less than thirty years, the
flow of patents roughly quadrupled. By contrast, neither innovation nor R&D expenditure have exhibited
any particular upwards trend, not to speak of factor productivity. While patent litigation has increased,
few patents are actively used. Patent litigation typically involves dying firms, that have accumulated huge
stockpile of patents but are no longer able to produce marketable products, suing new and innovative
firms. A once proud firm – one of the first producers of microchips, and who in our generation can forget
their first TI calculator – Texas Instruments was unable to make the transition to the PC revolution and
became, for a while, the symbol of a dying company trying to stay alive by suing the newcomers. In more
recent times, Microsoft has become the chief among the patent trolls. Once the giant of the software
industry Microsoft has been unable to make the leap to portable devices such as telephones and tablet
PCs. Unable to create and produce for the marketplace, Microsoft now attempts to claim a share of the
profits Googles generates in this market through patent litigation. A firm that when it was young and
innovative had a strong position against software patents – Bill Gates said in 1991: “If people had
understood how patents would be granted when most of today's ideas were invented and had taken out
patents, the industry would be at a complete standstill today...A future start-up with no patents of its own
will be forced to pay whatever price the giants choose to impose.” – now lobbies in Europe and Asia for
the introduction of software patents, which it already obtained in its home country.
To learn more about the actual effect of patents in the real world, let us consider the response of
Google to being pursued legally by a large competitor. One response is their recent purchase of Motorola
Mobility. Motorola, like TI and Microsoft, is a once proud company that has fallen on hard times. Why
the interest of Google? It is buying Motorola Mobility for its patent portfolio. Not for the ideas and
innovations in that portfolio – few if any changes or improvements to Google’s Android operating system
will result from the ownership or study of these software patents. The purpose of obtaining this patent
portfolio is purely defensive: it can be used to countersue Apple and Microsoft and blunt their legal attack
on Google. Talk to anyone in the software industry – or any industry except pharmaceuticals or medical
instruments. Read the Levin et al.  and the Cohen et al.  surveys of R&D managers. The
vast bulk of patents are not only useless, they don’t represent innovation at all. They are part of an arms
race. Any successful large company needs a large portfolio of patents to fend off potential lawsuits by
rivals and by patent trolls.
One could argue that purely defensive patenting is pretty harmless – after all it costs only about
$40,000 to file a successful patent application, and doing it on a large scale may make it cheaper.
However the acquisition of large patent portfolios by incumbents creates huge barriers to entry. We see
this in the smart-phone market. Here Apple is the market leader and Microsoft is unable to produce a
product that appeals to consumers. Each are incumbent firms with a large patent portfolio. The new
entrant and innovator – and it should be pointed out that while Android phones are imitations of iPhones
in many respects, their integration with the web is vastly superior to what is promised by Apple in its next
generation of iPhones – is Google. Google is a relatively new firm and while wealthy does not have a
large defensive patent portfolio. Hence we see both Apple and Microsoft attacking Google with patent
litigation. Apple in an effort to keep the market to itself for a few more years; Microsoft because it is
better to get a share of Google’s revenue than be shut out of the market completely. The actual economic
value of Microsoft’s patents can be measured by their inability to produce a product that occupies more
than a small corner of a large and growing market.
Despite the fact that patents are mostly used for arms races and that these, in turn, are driven by
patent trolls, there are not formal models of the way in which this can inefficiently inhibit entry. In the
arms race theory, if all firms get counterbalancing patent portfolios and all innovate, then they would have
innovated in the absence of patents – hence patents do not serve to encourage innovation. On the other
hand if (like Microsoft or other patent trolls) you do not produce a marketeable product you cannot be
countersued, and so you can use patents to share the profits without doing the work – hence patents do
discourage innovation and are a pure waste from a social standpoint.
A simple model helps to focus these thoughts. We suppose that there are two firms i = 1,2 who
must choose between innovating (I) and not innovating (N). We have in mind here the creation of a new
product, so that the choice to innovate is paramount to entering the market – a firm that does not innovate
is assumed to have no product to sell. To focus on the impact of patents on innovation, we assume that
taking out a patent is costless. When there is a single firm in the market it earns revenue R net of
production costs and if there are two firms, each earns revenue r , where R > r . This assumes that there
is some substitutability between products, but allows for some complementarity as well since we do not
require R ? 2r . Denote by c the cost of creating the new product. To avoid triviality, we assume that
R ?c > 0 so a firm will enter if it is guaranteed a monopoly. About efficiency, we assume that if it is
privately profitable to enter the market, then it is socially desirable to do so. Specifically, we assume that
it is socially efficient to have two firms in the market if r ?c > 0 . Similarly, we assume that if
R ?c > 0 it is better to have one firm in the market than none.
The key feature of the arms race is that a firm without a product but with a patent can still claim a
share of the market against a firm that has both a product and a patent. However, as is the case in practice,
it is not necessary to build a product – that is, incur the cost c - in order to take out a patent. Under a
patent system, then, both firms will take out patents as it is costless. Denote by ? the market share that a
firm that has a patent but no product can claim against a firm with a product and a patent. We assume that
? ? 1/2 so that it is not possible to claim a larger market share by not having a product than by having
one. In this setting there is a demand to be a patent troll: to take out a patent – which is relatively
inexpensive – in order to tax a competitor who also has a product beside having a patent.
We wish to compare what happens in this game with and without a patent system. Since there
may be several equilibria, we will focus on the most efficient pure strategy equilibrium. Bearing in mind
that we have assumed that patents never do any good and have no costs of being obtained, we will show
that patents and no patents do equally well, except in two cases: (I) r ?c < ?R and
(1? ?)R ?c < 0 and (ii) 0 < r ?c < ?R and (1? ?)R ?c > 0. In these two cases a system
without patents leads to strictly more innovation and is Pareto superior to a system with patents. To
demonstrate this result, we analyze first the simpler of the two games, the game without a patent system.
This has the form
I r ?c,r ?c R ?c,0
N 0,R ?c 0,0
If r ?c < 0 then there are two asymmetric equilibria where only one of the two firms enters (and a
mixed strategy equilibrium). Note that this is Pareto superior to having no innovation at all. If r ?c > 0
then it is a dominant strategy to enter, so both firms do so – and this is first best.
By contrast, with a patent system the game between the two firms has the form
I r ?c,r ?c (1? ?)R ?c,?R,
N ?R,(1??)R ?c 0,0
In this game there are four cases:
(i) If r ?c > ?R and (1? ?)R ?c > 0 then it is a dominant strategy for both to innovate.
Since this implies that r ?c > 0 the outcome is the same as when there are no patents.
(ii) If r ?c > ?R and (1? ?)R ?c < 0 then there is an equilibrium where both firms
innovate (the only equilibrium without patents), an equilibrium where neither firm innovates, and a mixed
equilibrium. Here the equilibrium in which both firms innovate is first best. The patent system potentially
does as well as no patents, except that the patent system allows the possibility of inefficient equilibria
which can be ruled out by prohibiting patents.
(iii) If r ?c < ?R and (1? ?)R ?c < 0 it is a dominant strategy for either firm not to
innovate. Without a patent system there is always a positive probability of innovation. The two
asymmetric equilibria both Pareto dominate the no innovation solution. Here, evaluated by the best
equilibrium, no patents Pareto dominate patents.
(iv) If r ?c < ?R and (1? ?)R ?c > 0 then there are two asymmetric equilibria where
only one of the two firms enters and a mixed strategy equilibrium. If r ?c > 0 then without patents
both firms enter: this is first best, so here it is more efficient not to have patents. If r ?c < 0 then the
best pure strategy equilibrium in both cases is the same: one firm entering.
3. The Political Economy of Patents
There is little dispute among economists that a well-designed patent system would serve to
encourage innovation. There is dispute among economists about whether the patent system as it exists
serves to encourage innovation – but, again, there is little dispute among economists that the patent
system as it exists is broken. To quote a proponent of patents, Shapiro :
A growing chorus of scholars and practitioners are expressing concerns about the operation of
the U.S. patent system. While there is no doubt that the U.S. economy remains highly innovative,
and there is no doubt that the patent system taken as a whole plays an important role in spurring
innovation, the general consensus is that the U.S. patent system is out of balance and can be
As we will document in the next section, in our view the evidence is instead clear that the patent system
taken as a whole does not play an important role in spurring innovation. While theorists such as Shapiro
may dispute our reading of the available data, they are part of a broad consensus about the elements of the
existing patent system that are broken – these we have discussed in the preceeding sections. We would
not dispute that, if these things were to be fixed and kept that way, the patent system would indeed serve
its intended purpose.
If a well-designed patent system would serve the intended purpose, why recommend abolishihg
it? Why not, instead, reform it? To answer the question we need to investigate the political economy of
patents: why has the political system resulted in the patent system we have? Our argument is that it cannot
be otherwise: the “optimal” patent system that a benevolent dictator would design and implement is not of
this world and it is pointless to advocate it as, by doing so, one only offers an intellectual fig-leaf to the
patent system we actually have, which is horribly broken. It is fine to recommend reform but, if politics
make it impossible to accomplish that reform, if they make it inevitable that if we have a patent system it
will fail, then abolition – preferably by constitutional means as was the case in Switzerland and the
Netherlands prior to the late 19th century – is the proper solution and proposals of reform are doomed to
fail. This logic of political economy brings us to the view that we should work toward a progressive
dismantlement of the patent system.
Suprisingly, despite the key importance of political economy in understanding why we have the
patent system we have, economists have had little to say on the subject and the few papers we know of –
Landes and Posner  and Scherer  – stand in evident contradiction with the established
consensus about the social usefulness of patents and, especially, of their strenghtening. On the one hand
we find the traditional advocacy of ideal patents as designed by a benevolent planner and, on the other
hand, the recognition that patent laws are mostly designed by interest groups keen to increase their
monopoly rents, not aggregate welfare. Consider the analysis carried out by Landes and Posner in their
pamphlet. They recognize the enormeous growth in intellectual property legislation and judiciary activity
during the last 30 years but then apply their otherwise sharp analytical tools to a couple of relatively
minor features of this phenomenon – specifically why the overall growth in IP protection has benefited
copyright’s holders even more than patent’s holders (it is not clear this is the case, still let us assume it is)
and why such an increase has taken place in the midst of the “deregulation oriented” political trend that
began in the late 1970s . They do not attempt to explain why the patent system seems to be capable of
only growing larger and larger, stronger and stronger, and costlier and costlier.
In carrying out their investigation Landes and Posner use interesting public choice arguments
grounded on the well known observation – valid for all kinds of legislation preventing free-entry and,
more generally, for all regulatory activity – that the lobbying effort and power of IP’s advocates are
bound to be much stronger than those of IP’s opposers. This follows from the fact that, once some kind of
even marginal IP protection is introduced, extending it will yield substantially higher per-capita rents to
the few holders of the right than reducing it would for the much larger number of non holders: the rent of
the monopolist is a lot higher than individual consumers’ deadweight loss. This, as they note, certainly
helps understand legislative actions such as the DMCA that greatly restricted the public domain in order
to defend the already substantial rents of a few copyright holders. It does not help, they also claim, to
understand why patent laws would be strenghtened in a period during which the ideological and political
trend favored the reduction of government intervention generally known as “deregulation”. To the latter
puzzle our authors provide an “ideological” resolution: supporters of deregulation are supporters of free
markets, supporters of free market like private property, and patents and copyright are intellectual
“property”. Hence, strenghtening them is ideologically and politically consistent with the general
principle that “private property is good for growth”. Interestingly the two authors do not seem to notice
that the basic public choice insight they started with provides a more straightforward economic answer to
the same question. An answer that, contrary to the ideological one, would be consistent with plentiful
facts we know about the life cycle of industries. In fact, neither Landes and Posner nor, apparently, most
industrial organization researchers, seem interested in figuring out why patents are either ignored or
scarcely used in new and competitive industries while being highly valued and over-used in mature and
highly concentrated ones. The point here seems to be that, being themselves strong advocates of the
usefullness of patents in fostering innovations, the authors fail to recognize the intrinsic problem with the
design of the institution itself. Being not a “property” right but rather a “monopoly” right, patent
possessors will automatically leverage whatever initial rents their monopoly provides them with in order
to increase their monopoly power until all potential rents are extracted and, probably, dissipated by the
associated lobbying and transaction costs.
The more elaborate writing by Scherer  follows a similar approach and suffers of the very
same limitations to an even greater extent. It focuses on a puzzle that is somewhat the reverse of the “IP
strenghtening in times of deregulation” that attracted Landes and Posner’s attention; this is the fact that
“government emphasis on patent systems increased” while academic research was starting to become
more and more aware that patents are playing a minor positive role, if at all, in creating incentives for
high R&D and in fostering productivity growth. After providing a concise but very well informed
historical survey of all major changes in the US patent’s policies over the last century or so, the author
wonders correctly why would political forces increase patent protection so much in light of the fact
[…] that the record of debates on the enabling bill contains no solid evidence that the change
would in fact stimulate R&D, and that there is no evidence of an acceleration in companyfinanced
R&D between the 27 years before the bill was enacted and the 18 years thereafter.”
[Scherer, 2009, p. 195]
In the rest of his pamphlet he extends the very same argument to the international arena, paying particular
attention to the case of pharmaceutical patents. While his language and arguments are strongly critical of
current trends in patents and copyright law, in our view the author fails short of leading his analysis to its
logical conclusions. That is to say: he neither recognizes that the problem is with the institution of
intellectual “property” itself (a word usage he nevertheless harshly criticizes) nor does he attempt to
provide an articulate theory of why a set of theoretically sound institutions, such as patents and copyright
were supposed to be, ought to degenerate into something so socially damaging exactly during the three
decades in which academic research was realizing their limitations and potential dangerousness. The
answer, though, seems rather straightforward.
The basic public choice observation recalled earlier implies that there are many players in the
patent game but that “consumers” are not among them. On the side of the potential patentees there are
individual inventors, corporate inventors and patent trolls who invent nothing but never-the-less fill out
patent applications making claims. On the other side is the patent office that issues patents, the patent
lawyers who file and litigate patents, and the courts where the litigation takes place. The rules of the game
are established – although only in part – by the executive and legislative branches of government, and
insofar as the interests of the general public are concerned, it is these players who represent them. Since
patenting is a technical subject about which few voters know anything with clarity – and hardly any are
likely to have a detailed empirical knowledge of the consequences of patent systems – the interests of
voters are not well represented at all, but rather the competing interests of the other players. This is
exactly the same phenomenon that Stigler  and other public choice theorists argue to have given
rise to regulatory capture in other spheres of government regulation. Hence to understand why the patent
system is the way it is, we need to understand the motivation and incentives of the relevant players.
Let us start with the patent office and a case study: the infamous “one-click” patent #5960411
issued to Amazon in September 1999. According to 35 U.S.C. 103, the statute under which the patent
office operates in issuing patents,
[to obtain a patent] the differences between the subject matter sought to be patented and the prior
art are such that the subject matter as a whole would have been obvious at the time the invention
was made to a person having ordinary skill in the art to which said subject matter pertains
Now, consider the facts. The patent in question claims, among other things, a monopoly over
11. A method for ordering an item using a client system, the method comprising: displaying
information identifying the item and displaying an indication of a single action that is to be
performed to order the identified item; and in response to only the indicated single action being
performed, sending to a server system a request to order the identified item whereby the item is
ordered independently of a shopping cart model and the order is fulfilled to complete a purchase
of the item.
The idea of taking a single action to accomplish a goal is hardly innovative, and applying the idea of
taking a single action to making a purchase is obvious to anybody who has ever used a soft-drink
machine, let alone someone with skill in the art of – say – marketing. It will hardly come as a surprise to
marketers of any generation that it is a good idea to make it as easy and simple as possible to make a
purchase. Let us think then logically – even as people not having ordinary skill in computer programming
– how this might be accomplished over the internet. First, credit card information is required, so if that is
not going to be demanded at the time of the transaction, it better be stored in advance by the retailer.
Second, the user must identify itself to the system so that the information can be retrieved when the
purchase is made. Those steps – obvious to all of us and more or less necessary to accomplish the desired
purpose – are exactly what Amazon describes in its patent, albeit with a few flow-charts thrown into the
eleven page patent application. But even with those flow charts it is relatively easy to see that the verbal
description of the single-click procedure can apply equally well to what happens on the Amazon site and
to what happens in millions of places in the US daily, when people purchase a soda can, or any other
item, from a very old-fashion selling machine.
The point here is that words do not mean what they seem to mean. While the patent office
routinely grants silly patents on things like swinging a swing or poking objects through the fifth
dimension, the Amazon patent was re-examined by the USPO starting in May 2006. After a preliminary
finding that, indeed, “obvious” means “obvious” even at the Patent Office, it reversed itself and, in
October 2007, re-affirmed the Amazon patent, albeit limiting its scope slightly. So we cannot dismiss
such a patently absurd patent as an aberration.
Why then does the patent office interpret the words “not obvious” as meaning “obvious”?
Consider who the clients of the patent office are: inventors, patent trolls and patent lawyers. Each and
every of these clients shares the same goal: they would like more patents issued. Hence the patent office
is constantly under pressure from its clients to be more generous in issuing patents – that is, adopt lower
standards of obviousness and steeper standards for what is considered prior art. Eventually – as George
Orwell predicted – words come to reverse their meaning. The following statement by the director of the
U.S. Patent Office concerning the allowance rate – what fraction of patents are accepted – is revealing
Overall in FY 2010, the allowance rate increased to 45.6%, compared to an allowance rate of
41.3% in FY 2009...So, while we still have a lot of work to do, I think we are on the right path.
Accepting a higher fraction of patents applications is, a priori and without caveat, “the right path”: talk
about “regulatory capture.”
The role of patent lawyers in the political economy of patents should not be overlooked.
According to a patent attorney, Quinn , legal fees for filing a patent run upwards of $7,000. In
2010, according to the patent office, 244,341 patents were issued, which would mean roughly a billion
and a half dollars in legal fees per year. Obviously patent attorneys, as a group, have a tremendous
incentive to see that more patents are issued. This helps us understand better the role of the courts and
their relatively recent reform. In 1982 – lobbied by patent lawyers – Congress passed the Federal Courts
Improvement Act. This moved patent appeals from the regular court system to a special court system for
dealing with patents. Naturally many of the judges for this new court were chosen from the ranks of
patent attorneys. For example, in the 1994 Tektronix decision expanding the scope of patents to software,
of the six judges who voted in favor (Rich, Newman, Lourie, Michel, Plager, Rader) half had previously
been patent attorneys, while of the two that voted against (Archer, Nies) neither had been. What this
means is that the referee of the game is biased both materially and ideologically: “That has been the
experience with the Federal Circuit; it has defined its mission as promoting technological progress by
enlarging patent rights.” (Landes and Posner , p.26)
Notice, too, the public goods aspect of defending in many patent lawsuits, especially those
concerned with the up-holding of a patent in front of alleged infringement. In these cases, the plaintiff
(usually claiming the defendant is not basing his product on previous art and/or that whatever his patent
describes is not obvious) appropriates all the benefits of winning the lawsuit. The defender, by contrast, if
successful benefits not only himself, but everyone else who might otherwise be sued by the plaintiff. The
latter is nothing but the “patent court” version of the, already noted, fundamental asymmetry in the
distribution of economic incentives that defines the foundations of the political economy of patents’ law.
It should be clear, then, that given this set of players and their incentives, the patent game can
have only one equilibrium over time, which is the one we have observed. Starting from a regime of
intellectual property protection that, about two centuries back, was restricted in its areas of applicability
and limited in both depth and duration over time – that is to say: it was somewhat “reasonable” to the
extent it balanced social gains and social costs – we have witnessed a monotone process of progressive
enlargment and strenghtening of patent laws. At each stage of this process of enlargment the main driving
force were the rent-seeking efforts of large, cash rich companies unable to keep up with new and creative
competitors. Patent laywers, patent officials and wannabe patent trolls usually acted as foot soldiers.
While this political economy process is theoretically pretty straightforward – especially because it closely
replicates similar experiences in other fields of regulation and, especially, in the development of barriers
to free trade – what is still missing is an empirical, quantitative analysis of the stakes involved and of the
gains and losses accruing to both the active players and to the rest of society, from the general public to
the innovators that, because of IP, never were.
4. Do Patents Encourage Productivity Growth?
We started this paper by stating that there is no empirical evidence that patents serve to increase
innovation and productivity, however measured. So far we have run through a variety of empirical and
theoretical reasons why patent systems are problematic and why being damaging to social welfare is
written in their DNA. Now we need to provide some support for that initial empirical statement: if there is
to be any rationale for patent systems, with all their ancillary costs, it must be that they actually do
manage to increase innovation and productivity. What is the evidence? How can we say so definitively
that there is no evidence that patents have the desired effect?
In Boldrin and Levine  we conducted a metastudy gathering the 24 studies we could find in
2006 that examined whether introducing or strengthening patent protection leads to greater innovation.
This includes three studies that are themselves surveys of earlier empirical work. The executive summary:
“these studies find weak or no evidence that strengthening patent regimes increases innovation; they find
evidence that strengthening the patent regime increases patenting! They also find evidence that, in
countries with initially weak IP regimes, strengthening IP increases the flow of foreign investment in
sectors where patents are frequently used.” Note that the issue of promoting FDI, while a well established
empirical consequence of strengthening patent regimes, is entirely besides the point. The same effect
could be obtained in many ways – for example by a limited strengthening of the patent regime simply to
protect the patents of companies that engage in FDI – and, in any case, FDI is not innovation.
As to the issue of innovation, after failing to find a single study claiming that innovation
increased as a consequence of the strengthening of U.S. patent protection in the 1980s, Gallini writes
Although it seems plausible that the strengthening of U.S. Patents may have contributed to the
rise in patenting over the past decade and a half, the connection has proven difficult to verify.
Jaffe also examines many studies and concludes
... despite the significance of the policy changes and the wide availability of detailed data relating
to patenting, robust conclusions regarding the empirical consequences for technological
innovations of changes in patent policy are few.
There is widespread unease that the costs of stronger patent protection may exceed the benefits.
Both theoretical and, to a lesser extent, empirical research suggest this possibility.
An interesting case in point and counterpoint is a study by Anwar and Evanson. They have data on 31
countries for the period 1981-1990. Using two 5 year averages they find support for the idea that higher
protection leads to higher R&D as a fraction of GDP. There are five levels of IP protection and R&D as a
fraction of GDP ranges from a ten year average of .231% in Jordan to 2.822% in Sweden. Since a country
with a larger market can more easily pay the fixed cost of innovation, we combine their data with GDP
data from the 1990 CIA World Fact Book. We can then regress per capita R&D expenditure on total GDP
to find that a 1% increase in the size of a country as measured by GDP increases the ratio of R&D to GDP
by 0.34%. More interesting is to see how the level of IP protection impacts the residuals
IP Level Average Residual
Increasing IP increases residual R&D expenditure at low level of protection – that is from 0 to 1 to 2. As
IP protection is increased further the residual R&D expenditure levels off then falls. Note that at the lower
levels we are probably observing primarily the effect of FDI: among poor countries with low IP
protection, increases bring in more foreign investment and in doing so directly raise R&D. In richer
countries with high levels of IP, foreign investment is not an issue, and increases in IP have little or no
effect on innovation.
The Lerner study is especially notable because he examined all significant changes in patent law
in all countries over the last 150 years. His conclusion:
Consider, for instance, policy changes that strengthen patent protection. Once overall trends in
patenting are adjusted for, the changes in patents by residents of the country undertaking the
policy change are negative, both in Great Britain and in the country itself. Subject to the caveats
noted in the conclusion this evidence suggests that these policy changes did not spur innovation.
This, in summary, what is currently known as the “patent puzzle” (Lerner ) and which, in
the light the competitive theory of innovation (Boldrin and Levine [2008a]) we find not puzzling at all
but, instead, substantially coherent with the predictions of economic theory.
Patents and Productivity
Does more patenting lead to more productivity? In Boldrin, Correa, Levine and Ornaghi 
we have tried to shed light on this question by carrying out a sequence of statistical tests and econometric
estimations both on an original microeconomic data set – obtained by combining firm-level information
obtained through Compustat, NBER and the BLS (see Appendix I of the cited paper for the technical
details) – and on an enriched version of the micro data set used by Aghion, Bloom, Blundell, Griffith and
Howitt  to first derive an “inverted-U” relationship between the size of the mark-up (by industries)
and a measure of patenting activity. The results show, rather unequivocally that:
1) Except for two of the possible specifications (see below) there is, in general, no statistically
significant correlation between measures of productivity (both labor and TFP) and patenting
activity (both number and citations). This is a more surprising result than one would expect
on the basis of purely theoretical considerations. In fact, one would expect patents to be at
least a decent predictor of productivity growth across sectors, certainly for the last couple of
decades during which their use was extended to more and more sectors. This finding leads us
to conjecture that the use of patents either as a defensive or as a rent seeking tool (Boldrin
and Levine ) is actually more widespread than one would predict.
2) The two specifications for which a positive correlation obtains regress labor productivity
growth in the sector, in any given year, on the number of patents awarded during the same
year (or on their future cumulative citations). This yields a statistically significant, but very
small, positive coefficient when using BLS output data, and a coefficient not statistically
different from zero with NBER output data. Because a picture is worth a thousand words we
reproduce here the scatter plots for these pairwise correlations.
-.4 -.2 0 .2 .4
0 2 4 6 8 10
dlabpr Linear prediction
3) Using the same data set we have regressed measures of innovation (patents or patent
citations) on the measure of competition (inverse of profitability) used by Aghion et al.
) We find a positive relationship which is remarkably robust to changes in industry
classification (SIC4 vs NAICS4), time sample period (1990-2001 vs 1975-2001), set of
sampled industries (manufacturing vs all industries).
4) Finally we studied the correlation between the same measure of competitive pressure and
objective measures of labor productivity growth. Interestingly, in this data set the correlation
displays an inverted-U relationship when one ignores that profitability is an endogenous
variable depending on, among other things, productivity growth and a monotone one when
one corrects for such endogeneity. Such positive correlation (replicating a pioneering and
unfortunately forgotten one, reported in Stigler ) is confirmed when the original firmlevel
observations are aggregated at the sectorial level and the regression is performed using
the sectorial averages on both sides of the equality sign.
5) The estimated correlation is, in fact, quite high. The average annual growth of productivity in
the sectors with the highest level of competition is up to 2% bigger than in the sectors with
the lowest level of competition. These are strikingly large differences when cumulated over
various decades, as it is the case in our data set.
-.4 -.2 0 .2 .4
0 10000 20000 30000 40000
dlabpr Linear prediction
The empirical finding, reported in Aghion et al  and based on a UK data set, according to
which the maximum innovative effort obtains at some “intermediate” position between perfect
substitutability (competition) and perfect complementarity (monopoly) has been seriously questioned in
Correa  and Hashmi . The latter re-examine the inverted-U relationship by using data from
publicly traded manufacturing firms in the US. Contrary to Aghion et al  he finds a robust positive
relationship between competition (as measured by the inverse of markups) and innovation (as measured
by citation-weighted patents). The investigation carried out by Correa  shows that, in fact, the
inverted-U relationship Aghion et al.  found in the UK data does not withstand a more careful
inspection. More precisely, by using the same data set of UK firms, Correa shows that the prediction of an
inverted-U is overturned when allowing for the possibility that innovations follow a memory process,
where the current probability of introducing a new innovation increases when a firm successfully
innovated in the previous period. Correa finds that there are 5 industries showing memory in the
innovation process, 10 for which the innovation process appears memory-less, and 2 industries for which
the innovation processes are difficult to determine. Next, Correa also shows that the model in question,
when applied to the same data, generates evidence of enogeneity in the instrument and of structural
breaks. His empirical analysis shows, convincingly, that there is a structural break in 1981, in coincidence
with the establishment (in the USA) of the Court of Appeals for the Federal Circuit (CAFC) in October of
1982 (recall that the data set in question uses USA patents of UK firms). Once this structural break is
taken into account, and the regressions performed separately for the two sub-periods, one finds that there
is a positive relationship between innovation and competition during the period 1973-1980, but no
relationship at all during the period 1981-1994. Further, considering the instrument endogeneity and the
structural break, Correa finds a positive innovation-competition relationship for the memory industries
before the 1982 Reform. However, he finds that there is no relationship between innovation and
competition for those industries that he classifies as memory-less.
In 1958 the distinguished economist Fritz Machlup in a report to Congress famously said
If we did not have a patent system, it would be irresponsible, on the basis of our present
knowledge of its economic consequences, to recommend instituting one. But since we have had a
patent system for a long time, it would be irresponsible, on the basis of our present knowledge, to
recommend abolishing it.
One might imagine that if it would be irresponsible to recommend abolishing it, it would be even more
irresponsible to further extend it. Moreover, one might hope that if it is indeed worth preserving such a
large government intrusion into private activity that that during the intervening six decades evidence
would emerge that patents do indeed serve the desired purpose of encouraging innovation. Sadly the story
of the past six decades is the opposite. In new industries such as biotechnology and software where
innovation was thriving in the absence of patents – patents have been introduced. Given this continued
extension has there been a substantial increase in innovation in recent years? On the contary, it is apparent
that the recent explosion of patents in the U.S., the E.U. and Japan, has not brought about anything
The software industry is an important case in point. In a dramatic example of judge-made law, in
the early 1990s sofware patents became possible for the first time. Bessen and Meurer in a large body of
empirical work studied the consequences of this unnatural experiment, culminating their  book
entitled Patent Failure the title of which summarizes how effective software patents have been for
promoting the common good. With six decades of further study since Machlup’s report failing to find
evidence that patents do promote the common good, it is surely time to reconsider his recommendation
that it would be irresponsible to abolish the patent system. On the contrary: a system that at one time
served to limit the power of royalty to reward favored individuals with monopolies has become with the
passage of time a system that serves primarily to encourage failing monopolists to inhibit competition by
Abolishing patents may seem “pie-in-the-sky” and there are certainly many interim measures that
can be taken to mitigate the damage: properly interpreting obviousness, requiring genuine disclosure of
working methods and an independent invention defense against patent infringement are useful and –
among economists – relatively uncontroversial measures. But why use a band-aid to staunch a major
wound? Economists fought for decades – and ultimately with great success – to abolish trade restrictions.
It will not escape the careful reader that patents are very much akin to trade restrictions as they prevent
the free entry of competitors in national markets, thereby reducing the growth of productive capacity and
slowing down economic growth. The same way that trade restrictions were progressively reduced until
reaching (almost complete) abolition, a similar (albeit, hopefully less slow) approach should be adopted to
“get rid” of patents. Moreover the nature of patents as time-limited makes it relatively easy to phase them
out by phasing in ever shorter patent durations. This conservative approach has also the advantage that if
reducing patent terms indeed has a catastrophic effect on innovation the process can easily be reversed.
There are of course many transitional issues to be worked out. This is particularly the case with
respect to pharmaceutical products where patents are only one piece of a complicated regulatory jungle
including the approval process and the market exclusivity protections all of which would need to be
adjusted as patents are phased out. Because policy proposals are better digested and metabolized when
served in the form of small pills, here is our list of small reforms that could be easily implemented.
(1) Stop the rising tide that, since the early 1980s, is both extending the set of “things” that
can be patented and shifting the legal and judicial balance more and more in favor of patent’s holders.
(2) Because competition fosters productivity growth, anti-trust and competition policies
should be seen as a key tool to foster innovation. This is of particular relevance for high tech sectors, from
software to bioengineering, to medical products and pharmaceuticals.
(3) Free trade is a key part of competition policies hence the role that WTO-WIPO-TRIPS
play should be redefined to move away from the current neo-mercantilist approach toward free trade in
goods and ideas. The aim here should be that of stopping the policy of exporting our intellectual policy
laws towards other countries while adopting a policy of exporting free trade and competition in
innovation. This seems an urgent goal because, within a couple of decades, the “balance of trade in ideas”
between US+EU and Asia may easily reverse. At that point the temptation to engage in “mercantilism of
ideas” may well affect the now developing Asian countries, leading to a general increase in IP protection
(4) Cross industry variation in the importance of patents suggests we may want to start
tailoring patent’s length and breadth to different sectorial needs. Substantial empirical work needs to be
done to implement this properly, even if there already exists a vast legal literature pointing in this
(5) Reversing the burden of proof: patents should be allowed only when monopoly power is
justified by evidence about fixed costs and actual lack of appropriability. The operational model should be
that of “regulated utilities”: patents to be awarded only when strictly needed on economic grounds. This
requires reforming the USPO, which is urgently needed in any case.
(6) Prizes and competition. An interesting approach is that of operating to change the role
that the NSF and the NIH play in fostering innovation. The basic goal, in this case, is that of reversing the
principle according to which federally financed investigation can lead to private patents. As a first step we
would advocating going back to the old rule according to which the results of federally subsidized
research cannot lead to the creation of new private monopolies but should be available to all market
participants. This reform would be particularly useful for the pharmaceutical industry.
(7) With regards to the latter, we advocate reforming pharmaceutical regulation to either treat
stage II and III clinical trials as public goods (to be financed by NIH on a competitive basis) or by
allowing the commercialization (at regulated prices equal to the economic costs) of drugs that satisfy the
FDA requirements for safety even if they do not yet satisfy the current, over-demanding, requisites for
proving efficacy. It is ensuring the efficacy—not the safety—of drugs that is most expensive, timeconsuming
and difficult. All the usual mechanisms of ensuring the safety of drugs would remain firmly in
place. While pharmaceutical companies would be requested to sell new drugs at “economic cost” until
efficacy is proved, they could start selling at market prices after that. In this way, companies would face
strong incentives to conduct or fund appropriate efficacy studies where they deem the potential market for
such drugs to be large enough to bear the additional costs. At the same time this “progressive” approval
system would give cures for rare diseases the fighting chance they currently do not have. This solution
would substantially reduce the risks and cost of developing new drugs.
(8) If this progressive approval approach works for rare diseases, there is no reason is should
not be adopted across the board. The current system favors a small number of blockbuster drugs that can
be sold to millions of patients. The coming revolution in medicine will rely on carefully targeting
hundreds or even thousands of drugs to the correct patients. But lawmakers must first usher in a new
system that makes developing these precision treatments possible. The regulation reform we are
suggesting would be a first important step to achieve such goal.
The aim of policy, in general, should be that of slowly but surely decreasing the strength of
intellectual property interventions but the final goal cannot be anything short of abolition. Once again, if
at the times of Machlup one could still nurture doubts and wonder if the system could not be reformed in
a credible and stable form, in 2012 one must ask: is not six decades of failure enough time? Is it not time
to take seriously the idea of patent abolition and begin the discussion of these transitional issues?
Aghion P., Bloom N., Blundell R., Griffith R. and P. Howitt , “Competition and Innovation: An
Inverted U Relationship”, Quarterly Journal of Economics 120:701-728.
Bessen, James and Michael J. Meurer , Patent Failure: How Judges, Bureaucrats, and Lawyers Put
Innovators at Risk, Princeton University Press.
Boldrin, Michele and David K. Levine , “Rent Seeking and Innovation”, Journal of Monetary
Economics, 51: 127-160.
Boldrin, Michele and David K. Levine , “The economics of ideas and intellectual property”,
Proceedings of the National Academy of Sciences 102: 1252–56.
Boldrin, Michele and David K. Levine [2008a],” Perfectly competitive innovation”, Journal of Monetary
Boldrin, Michele and David K. Levine [2008b], Against Intellectual Monopoly, Cambridge University
Boldrin, Michele, Juan Correa Allamand, David K. Levine and Carmine Ornaghi , “Competition
and Innovation”, Cato Papers on Public Policy, Vol. 1.
Chaudhuri, Shubham, Pinelopi K. Goldberg and Panle Jia , “The Effects of Extending Intellectual
Property Rights Protection to Developing Countries: A Case Study of the Indian Pharmaceutical
Market”, The American Economic Review, 96: .
Cohen, W. M., Richard R. Nelson and J. P. Walsh , “Protecting Their Intellectual Assets:
Appropriability Conditions and Why U.S. Manufacturing Firms Patent (or Not)”, N.B.E.R.
Working Paper No. 7552, February.
Correa, J.A. , “Innovation & Competition Relationship in a Memory Process”, Ph.D. Dissertation,
University of Southampton; forthcoming in the Journal of Applied Econometrics under the title
“Innovation & Competition: An Unstable Relationship”.
Danaher, Brett, Dhanasobhon, Samita, Smith, Michael D. and Telang, Rahul, , “Converting Pirates
Without Cannibalizing Purchasers: The Impact of Digital Distribution on Physical Sales and
Internet Piracy” (March 3). Available at SSRN: http://ssrn.com/abstract=1381827 or
Hashmi, A.R. , “Competition and Innovation: The Inverted-U Relationship Revisited”, mimeo,
National University of Singapore, February.
Heller, M. , “The Gridlock Economy: How Too Much Ownership Wrecks Markets, Stops
Innovation, and Costs Lives,” Basic Books.
Hong, Sungook , Wireless: from Marconi’s Black-Box to the Audion, MIT University Press.
Jovanovic, Boyan and Glenn MacDonald , “The Life Cycle of a Competitive Industry”, The
Journal of Political Economy, 102: 322-347.
Landes, William M. and Richard A. Posner , The Political Economy of Intellectually Property Law,
AEI-Brookings Joint Center for Regulatory Studies, Washington D.C.
Lee, T.  “A Patent Lie”, The New York Times, June 9.
Llanes, Gaston and Stefano Trento , “Patent Policy, Patent Pools, and the Accumulation of Claims
in Sequential Innovation”, forthcoming, Economic Theory,
Levin, Richard C., A.K. Klevorick, Robert R. Nelson, and Sidney G. Winter , “Appropriating the
Returns from Industrial Research and Development”, Brookings Papers on Economic Activity,
No. 3, 783-820.
Lerner, Josh , “The Empirical Impact of Intellectual Property Rights on Innovation: Puzzles and
Clues”, The American Economic Review P&P, 99 (2): 343-348
Machlup, Fritz  “An Economic Review of the Patent System,” Testimony before the Senate
Judiciary Subcommittee on Patents, Trademarks, and Copyrights, 85th Congress, 2nd session.
Moser, Petra , “Determinants of Innovation - Evidence from 19th Century World Fairs”, The
Journal of Economic History, 64: 548-552.
Moser, Petra , “How Do Patent Laws Influence Innovation? Evidence from Nineteenth-Century
World Fairs,” The American Economic Review, 95: 1214-1236.
Niccolai, James , “Android developers ignored Sun patents, Google exec testifies,”
Computerworld, May 9.
Nuvolari, Alessandro [2004a], “Collective Invention during the British Industrial Revolution: The Case
of the Cornish Pumping Engine”, Cambridge Journal of Economics 28: 347-363.
Nuvolari, Alessandro [2004b], The Making of Steam Power Technology, Eindhoven Centre for Innovation
Ponce, Carlos , “More Secrecy...More Knowledge Disclosure? On Disclosure Outside of Patents”,
mimeo, Universidad Carlos III de Madrid.
Quinn, G. , “The Cost of Obtaining a Patent in the US”, IPWatchdog.com, January 28.
Sanchez, Julian , “How Copyright Industries Con Congress”, on Cato@Liberty, available at
Scherer, Frederic M. , Industrial Market Structure and Economic Performance, Houghton Mifflin
Scherer, Frederic M. , The Political Economy of Patent Policy Reform, J. TELECOMM. & HIGH
TECH. L., vol 7:167-216,
Schestowitz, R. , “Microsoft Pushing Hard for Software Patents in Europe While Halliburton
Makes British/European Patent Lawyers Happy” http://techrights.org/ December 10.
Shapiro, Carl , “Patent Reform: Aligning Reward and Contribution” NBER Working Paper No.
Shulman, Seth , Unlocking the Sky, Harper Perennial
Sinha, Rajiv K., Fernando S. Machado and Collin Sellman , “Don’t Think Twice, It’s All
Right:Music Piracy and Pricing in a DRM-Free Environment”, Journal of Marketing, 74: 40-54.
Stigler, George , “The Theory of Economic Regulation”, The Bell Journal of Economics and
Management Science, 2: 3-21