Recent Research Papers:

“Screening Property Rights for Innovation” with William Matcham, CEPR Discussion Paper, July 2023, Revise and resubmit at Econometrica

Work in Progress:

“Patent Screening in Diverse Technology Fields” with William Matcham

“Micro-Dynamics and Structure of Creative Destruction” with William Matcham

Books:

The Comingled Code: Open Source and Economic Development, with Josh Lerner (Cambridge, MA: MIT Press, October 2010). Paperback edition issued in 2013.
Reviewed in The Economist (13 January 2011)
Excerpts published in European Financial Review (December 2011-January 2012): 40-44
Polish edition (Free Media Publishing, Warsaw), Korean edition (Acorn Publishing, 2013)

Published articles:

“A New Approach to Patent Reform,” with Janet Freilich, Michael Meurer and Florian Schuett. Forthcoming in the UC Irvine Law Review (March 2024).

“Licensing Life-Saving Drugs for Developing Countries: Evidence from the Medicines Patent Pool,” with Alberto Galasso. Accepted for publication in the Review of Economics and Statistics (2022), forthcoming in 2024.

“Patent Screening, Innovation and Welfare,” with Florian Schuett. Review of Economic Studies (2022), 89: 2101-2148

“Government Financing of R&D: A Mechanism Design Approach,” with Saul Lach and Zvika Neaman, American Economic Journal: Microeconomics (2021), 13(3): 238-272

“Patent Rights, Innovation and Firm Exit, with Alberto Galasso, RAND Journal of Economics (Spring 2018), 49(1): 64-86

“Patents and the Global Diffusion of New Drugs, with Iain Cockburn and Jean Lanjouw. American Economic Review (2016), 106(1): 136-164

“Patents and Cumulative Innovation: Causal Evidence from the Courts, with Alberto Galasso. Quarterly Journal of Economics (2015), 130 (1): 317-369

“Patent Rights and Cumulative Innovation: Causal Evidence and Implications for Policy, in Austrian Council for Research and Technology Development, Designing the Future: Economic, Societal and Political Dimensions of Innovation (Vienna: Echomedia Buchverlag2015), 413-430

“Motivation and Sorting of Human Capital in Open Innovation, with Sharon Belenzon. Strategic Management Journal (2015), 36(6): 795-820, lead article. Available online at journal website

“Identifying Technology Spillovers and Product Market Rivalry, with Nick Bloom and John Van Reenen. Econometrica (2013), 81(4): 1347-1393. Supplement (Appendices) published on Econometrica Supplementary Material website: 1-33

“Trading and Enforcing Patent Rights,” with Alberto Galasso and Carlos Serrano, RAND Journal of Economics (Summer 2013), 44(2): 275-312

“Spreading the Word: Geography, Policy and Knowledge Spillovers,” with Sharon Belenzon, Review of Economics and Statistics (2013), 95(3): 884-903

“Strategic Patenting and Software Innovation,” with Michael Noel, Journal of Industrial Economics (2013), Volume LXI, No. 3: 481-520

“Editor and “Introduction to Symposium on Patents, Entrepreneurship and Innovation,” Journal of Industrial Economics (2013), Volume LXI, No. 3: 471-480

“Patent Thickets, Courts and the Market for Innovation,” with Alberto Galasso, RAND Journal of Economics, vol. 41, no. 3 (2010): 472-503

“University Knowledge Transfer: Private Ownership, Incentives and Local Development Objectives,” with Sharon Belenzon, Journal of Law and Economics, vol.52 (2009): 111-144

“Improving Patent Incentives and Enforcement,” Journal of Intellectual Property Law and Practice (September 2009): 11-23

“Comments on ‘A Policy Shaped Research Agenda on the Economics of Science and Technology Policy’,” in Dominique Foray (ed.), The New Economics of Technology Policy (Cheltenham: Edward Elgar Publishing, 2009): 122-26

“Incentives and Invention in Universities,” with Saul Lach, RAND Journal of Economics, vol. 39, no.2 (2008): 403-433

“On the Welfare Effects and Political Economy of Competition-Enhancing Policies,” with Philippe Aghion, Economic Journal,114 (October 2004), 804-824

“Royalty Sharing and Technology Licensing in Universities,” with Saul Lach, Journal of the European Economic Association, 2 (2/3), (April-May 2004): 252-264

“Protecting Patent Rights: Are Small Firms Handicapped?” with Jean Lanjouw, Journal of Law and Economics, 48(1), (April 2004), 45-74

“Patent Quality and Research Productivity: Measuring Innovation with Multiple Indicators,” with Jean Lanjouw. Economic Journal (April 2004): 441-465

 “Idiosyncratic and Common Shocks to Investment Decisions,” Economic Journal (October 2002): 766-785

“An Empirical Analysis of the Enforcement of Patent Rights in the United States,” with Jean Lanjouw,  in Patents in the Knowledge-Based Economy, ed. Wesley Cohen and Steven Merrill (National Academy Press: Washington, D.C., 2003): 145-179

“Damages and Injunctions for Protecting Intellectual Property,” with Suzanne Scotchmer. RAND Journal of Economics (2001): 199-221

“Characteristics of Patent Litigation: A Window on Competition,” with Jean Lanjouw, RAND Journal of Economics (2001), 129-151.  Reprinted in Robert Merges, ed., Economics of Intellectual Property Law (Edward Elgar Publishing, 2007)

"Intervention, Corruption and Capture: The Nexus between Enterprises and the State," with Joel Hellman, Economics of Transition (2000): 545-576

“Patent Renewals and R&D Incentives,” with Francesca Cornelli, RAND Journal of Economics (1999): 17-34

“Comments in R&D Roundtable,” in Samuel Kortum, ed., “An R&D Roundtable,” Economics of Innovation and New Technology (2004),13(4): 349-363

Competition, Entry and the Social Returns to Infrastructure in Transition Economies,” with Philippe Aghion, Economics of Transition (March 1999), 79-104

“Governance in Transition,” Transition Report: Enterprise Performance and Growth (European Bank for Reconstruction and Development, Her Majesty’s Stationery Office: London, 1999), Chapter 6, 48-59

"How Valuable is Patent Protection? Estimates by Technology Field,"RAND Journal of Economics, vol. 29, no.1 (1998), 77-107

“Enterprise Restructuring and Social Benefits,” with Simon Commander, Economics of Transition, vol.5, no.1 (1997), 1-24

“Growth in Transition Economies: Sources and Obstacles,” with Philippe Aghion, in Transition Report: Enterprise Performance and Growth(European Bank for Reconstruction and Development, Her Majesty’s Stationery Office: London, 1997), Chapter 3, 48-59

“Symmetric Regulation for Competitive Telecommunications,” Information Economics and Policy, vol.8 (1996), 3-23

Transition Report: Investment and Enterprise Development (European Bank for Reconstruction and Development, distributed by Her Majesty’s Stationery Office: London, 1995), editor and co-author of 3 chapters:

"Transition: measurement and indicators," Chapter 2, 14-32

"Transition Impact of Investment Projects," Chapter 7, 118-126

"Ownership, Governance and Restructuring," with Philippe Aghion, Chapter 8, 128-138

“Exploiting New Market Opportunities in Telecommunications,” with V Bishop and A Mody, in Infrastructure Delivery: Private Initiatives and the Public Good, edited by Ashok Mody (Washington, D.C.: World Bank, 1997), 37-78

"Measurement of the Value of Patent Rights and Inventive Output Using Patent Renewal Data", Science and Technology Indicators Review (Paris: OECD, 1991), 101-122

"Dynamics of R&D and Investment in the Scientific Sector", with Saul Lach, Journal of Political Economy (August 1989), 880-904

"Estimates of the Value of Patent Rights in European Countries During the Post-1950 Period," with Ariel Pakes, Economic Journal (December 1986), 1052-1076.  Reprinted in Robert Merges, ed., Economics of Intellectual Property Law (Edward Elgar Publishing, 2007).

"A Test of static Equilibrium Models and Rates of Return to Quasi-Fixed Factors, with an Application to the Bell System", with M.I. Nadiri, Journal of Econometrics (October/November 1986), 97-118

"Estimating the Effects of R&D on Bell System Productivity: A Model of Embodied Technical Change", with Roger Gordon and Richard Spady, in M. Peston and R. Quandt, eds., Prices, Competition and Equilibrium (Oxford: Philip Allan Press, 1986), 164-190

"Valeur et obsolescence des brevets: une analyse des statistiques de renouvellement des brevets Européens", Revue Economique: Economie de la Recherche-Développement (September 1985), 917-942

"An Exploration into the Determinants of Research intensity", with Ariel Pakes, in Z. Griliches, ed., R&D, Patents and Productivity (Chicago: University of Chicago Press, 1984), 209-233

"Investment in R&D, Costs of Adjustment and Expectations", with M.I. Nadiri, in Zvi Griliches, ed., R&D, Patents and Productivity, (Chicago: University of Chicago Press, 1984), 315-338

"The Rate of Obsolescence of Patents, Research Gestation Lags, and the Private Rate of Return to Research Resources", with Ariel Pakes, in Zvi Griliches, ed., R&D, Patents and Productivity (Chicago: University of Chicago Press, 1984), 98-112

"Comment on Long Run Trends in Patents", in Zvi Griliches, ed., R&D, Patents and Productivity University of Chicago Press, 1984)

"Technical Change, Returns to Scale, and the Productivity Slowdown," with M.I. Nadiri, American Economic Review (May 1981), 314-319

"The Structure of Production, Technological Change, and Total Factor Productivity Growth in the Bell System", with M.I. Nadiri, in T. Cowing and R. Stevenson, eds., Productivity Measurement in Regulated Industries (New York: Academic Press, 1981), 219-247

“The Effects of Double Counting and Expensing on the Measured Returns to R&D,” Review of Economics and Statistics (August 1981), 454-459

"Identical Bids and Cartel Behavior,” with William Comanor, Bell Journal of Economics and Management Science (Spring 1976), 281-286

"Common Costs in Pharmaceutical Research and Development: Implications for Direct Price Regulation", in Samuel Mitchell and Emery Link, ed., Impact of Public Policy on Drug Innovation and Pricing (American University Press: Washington, 1976), 3-26