Patent Citations—An Analysis of Quality Differences and Citing Practices in Hybrid Corn

References

• Abrams DS, Akcigit U, Popadak J (2013) Patent value and citations: Creative destruction or strategic disruption? NBER Working Paper 19647, National Bureau of Economic Research, Cambridge, MA.Crossref, Google Scholar
• Aghion P, Bloom N, Blundell R, Griffith R, Howitt P (2005) Competition and innovation: An inverted-U relationship. Quart. J. Econom. 120(2):701–728.Google Scholar
• Albert MD, Avery D, Narin F, McAllister P (1991) Direct validation of citation counts as indicators of industrially important patents. Res. Policy 20(3):251–259.Crossref, Google Scholar
• Alcácer J, Gittelman M (2006) Patent citations as a measure of knowledge flows: The influence of examiner citations. Rev. Econom. Statist. 88(4):774–779.Crossref, Google Scholar
• Alcácer J, Gittelman M, Sampat B (2009) Applicant and examiner citations in U.S. patents: An overview and analysis. Res. Policy 38(2):415–427.Crossref, Google Scholar
• Belanzon S (2012) Cumulative innovation and market value: Evidence from patent citations. Econom. J. 122(559):265–285.Google Scholar
• Benzion G (2009) Telephone interview with Paul Rhode, October 26.Google Scholar
• Bessen J (2008) The value of U.S. patents by owner and patent characteristics. Res. Policy 37(5):932–945.Crossref, Google Scholar
• Bloom N, Schankerman M, Van Reenen J (2013) Identifying technology spillovers and product market rivalry. Econometrica 81(4):1347–1393.Crossref, Google Scholar
• Carpenter MP, Narin F, Woolf P (1981) Citation rates to technologically important patents. World Patent Inform. 3(4):160–163.Crossref, Google Scholar
• Cockburn IM, MacGarvie MJ (2001) Entry and patenting in the software industry. Management Sci. 57(5):915–933.Link, Google Scholar
• Cockburn IM, Kortum S, Stern S (2002) Are all patent examiners equal? The impact of examiner characteristics. NBER Working Paper 8980, National Bureau of Economic Research, Cambridge, MA.Crossref, Google Scholar
• Coulter J, Van Roekel R (2009) Selecting corn hybrids for grain production. Report, University of Minnesota Extension, St. Paul, MN. Accessed June 2014, http://www.extension.umn.edu/agriculture/corn/hybrid-selection-and-genetics/selecting-corn-hybrids-for-grain-production/.Google Scholar
• Criscuolo P, Verspagen B (2008) Does it matter where patent citations come from? Inventor vs. examiner citations in European patents. Res. Policy 37(10):1892–1908.Crossref, Google Scholar
• Fernandez-Cornejo J, Wechsler S (2012) Revisiting the impact of Bt corn adoption by U.S. farmers. Agricultural Resource Econom. Rev. 41(3):377–390.Crossref, Google Scholar
• Fernandez-Cornejo J, Wechsler S, Livingston M, Mitchell L (2014) Genetically engineered crops in the United States. Economic Research Report ERR-162, Economic Research Service, U.S. Department of Agriculture, Washington, DC.Google Scholar
• Furman JL, Stern S (2011) Climbing atop the shoulders of giants: The impact of institutions on cumulative research. Amer. Econom. Rev. 101(5):1933–63.Crossref, Google Scholar
• Galasso A, Schankerman M (2015) Patents and cumulative innovation: Causal evidence from the courts. Quart. J. Econom. 130(1):317–369.Crossref, Google Scholar
• Griliches Z (1957) Hybrid corn: An exploration in the economics of technological change. Econometrica 25(4):501–522.Crossref, Google Scholar
• Griliches Z (1960) Hybrid corn and the economics of innovation. Science 132(3422):275–280.Crossref, Google Scholar
• Griliches Z (1990) Patent statistics as economic indicators. J. Econom. Literature 28(4):1661–1707.Google Scholar
• Hall BH, Jaffe AB, Trajtenberg M (2001) The NBER patent citation data file: Lessons, insights and methodological tools. NBER Working Papers 8498, National Bureau of Economic Research, Cambridge, MA.Crossref, Google Scholar
• Hall BH, Jaffe AB, Trajtenberg M (2005) Market value and patent citations. RAND J. Econom. 36(1):16–38.Google Scholar
• Harhoff D, Wagner S (2009) The duration of patent examination at the European patent office. Management Sci. 55(12):1969–1984.Link, Google Scholar
• Harhoff D, Narin F, Scherer FM, Vopel K (1999) Citation frequency and the value of patented inventions. Rev. Econom. Statist. 81(3):511–515.Crossref, Google Scholar
• Hegde D, Sampat B (2009) Examiner citations, applicant citations, and the private value of patents. Econom. Lett. 105(3):287–289.Crossref, Google Scholar
• Hibberd KA, Anderson PC, Barker M (1985) Tryptophan overproducer mutants of cereal crops. U.S. Patent 4,581,847, filed February 21, 1985, and issued February 10, 1987.Google Scholar
• Hotchkiss JR (2002) Inbred corn plant 89AHD12 and seeds thereof. U.S. Patent 6,433,261, filed January 8, 2001, and issued August 13, 2002.Google Scholar
• Jaffe AB (1998) Evidence from patents and patent citations on the impact of NASA and other federal labs on commercial innovation. J. Indust. Econom. 46(2):183–205.Crossref, Google Scholar
• Kerr WR (2010) Breakthrough inventions and migrating clusters of innovation. J. Urban Econom. 67(1):46–60.Crossref, Google Scholar
• Kogan L, Papanikolaou D, Seru A, Stoffman N (2012) Technological innovation, resource allocation, and growth. NBER Working Paper 17769, National Bureau of Economic Research, Cambridge, MA.Crossref, Google Scholar
• Kortum S, Lerner J (1999) What is behind the recent surge in patenting? Res. Policy 28(1):1–22.Crossref, Google Scholar
• Kortum S, Lerner J (2000) Assessing the contribution of venture capital to innovation. RAND J. Econom. 31(4):674–692.Crossref, Google Scholar
• Kuznets S (1962) Inventive activity: Problems of definition and measurement. The Rate and Direction of Inventive Activity: Economic and Social Factors (Princeton University Press, Princeton, NJ),19–52.Crossref, Google Scholar
• Lampe R (2012) Strategic citation. Rev. Econom. Statist. 94(1):320–333.Crossref, Google Scholar
• Lampe R, Moser P (2012) Patent pools, competition, and innovation—Evidence from 20 US industries under the New Deal. J. Law Econom. Organ. 32(1):1–36.Crossref, Google Scholar
• Lanjouw JO, Schankerman M (2004) Patent quality and research productivity: Measuring innovation with multiple indicators. Econom. J. 114(495):441–465.Google Scholar
• Lemley M (2001) Rational ignorance at the patent office. Northwestern Univ. Law Rev. 95(1):21–56.Google Scholar
• Lemley MA, Sampat BN (2012) Examiner characteristics and patent office outcomes. Rev. Econom. Statist. 94(3):817–827.Crossref, Google Scholar
• Lerner J (2002) Where does State Street lead? A first look at finance patents, 1971 to 2000. J. Finance 57(2):901–930.Crossref, Google Scholar
• Lindsey MF (1985) Novel hybrid corn plant. U.S. Patent 4,629,819, filed April 26, 1985, and issued December 16, 1986.Google Scholar
• Lindsey MF (1990) Hybrid corn with a genetic complement producing increased yield, seedling vigor, early stand, stalk strength and low harvest moisture. U.S. Patent 5,589,605, filed November 8, 1990, and issued December 31, 1996.Google Scholar
• Mehta A, Rysman M, Simcoe T (2009) Identifying the age profile of patent citations: New estimates of knowledge diffusion. J. Appl. Econometrics 25(7):1179–1204.Crossref, Google Scholar
• Merrill S, Levin R, Myers M (2004) A Patent System for the 21st Century (National Academies Press, Washington, DC).Google Scholar
• Morgan MF, Troyer AF (1992) Methods and compositions of a hybrid genetic corn complement, DK743. U.S. Patent 5,449,855, filed January 24, 1992, and issued September 12, 1995.Google Scholar
• Moser P (2005) How do patent laws influence innovation? Evidence from nineteenth-century world fairs. Amer. Econom. Rev. 95(4):1214–1236.Crossref, Google Scholar
• Moser P (2012) Innovation without patents: Evidence from World’s Fairs. J. Law Econom. 55(1):43–74.Crossref, Google Scholar
• Moser P, Rhode PW (2012) Did plant patents create the American rose? Lerner J, Stern S, eds. The Rate and Direction of Inventive Activity Revisited (University of Chicago Press Chicago),413–438.Google Scholar
• Moser P, Voena A (2012) Compulsory licensing: Evidence from the Trading with the Enemy Act. Amer. Econom. Rev. 102(1):396–427.Crossref, Google Scholar
• Moser P, Wong P (2015) Competition and innovation: Did Monsanto’s entry encourage innovation in GMO crops? Working paper, New York University, New York. http://ssrn.com/abstract=2588330.Google Scholar
• Moser P, Voena A, Waldinger F (2014) German Jewish emigres and US invention. Amer. Econom. Rev. 104(10):3222–55.Crossref, Google Scholar
• Olmstead AL, Rhode PW (2008) Creating Abundance: Biological Innovation and American Agricultural Development (Cambridge University Press, New York).Google Scholar
• Pioneer Hi-Bred International, Inc. (2004) Corn hybrid-herbicide management guide. Report, Pioneer Hi-Bred International, Johnston, IA.Google Scholar
• Pioneer Hi-Bred International, Inc. (2005) Corn hybrid-herbicide management guide. Report, Pioneer Hi-Bred International, Johnston, IA.Google Scholar
• Pioneer Hi-Bred International, Inc. (2006) Corn hybrid-herbicide management guide. Report, Pioneer Hi-Bred International, Johnston, IA.Google Scholar
• Puskaric V, Carrigan L (1988) Hybrid corn plant and seed. U.S. Patent 4,731,499, filed January 29, 1987, and issued March 15, 1988.Google Scholar
• Putnam J (1996) The value of international patent rights. Ph.D. thesis, Yale University, New Haven, CT.Google Scholar
• Qian Y (2007) Do national patent laws stimulate domestic innovation in a global patenting environment? A cross-country analysis of pharmaceutical patent protection, 1978–2002. Rev. Econom. Statist. 89(3):436–453.Crossref, Google Scholar
• Regibeau P, Rockett K (2007) Are more important patents approved more slowly and should they be? CEPR Discussion Paper DP6178, Centre for Economic Policy Research, London. http://ssrn.com/abstract=1133822.Google Scholar
• Sampat BN (2010) When do patent applicants search for prior art? J. Law Econom. 53(2):399–416.Crossref, Google Scholar
• Schankerman M, Pakes A (1986) Estimates of the value of patent rights in European countries during the post-1950 period. Econom. J. 96(384):1052–1077.Google Scholar
• Schmookler J (1962) Economic sources of inventive activity. J. Econom. History 22(1):1–20.Crossref, Google Scholar
• Schmookler J (1966) Invention and Economic Growth (Harvard University Press, Cambridge, MA).Crossref, Google Scholar
• Scotchmer S (1991) Standing on the shoulders of giants: Cumulative research and the patent law. J. Econom. Perspect. 5(1):29–41.Crossref, Google Scholar
• Seifert R, Noble SW, Niebur WS (1987) Hybrid corn plant and seed. U.S. Patent 4,737,596, filed January 29, 1987, and issued April 12, 1988.Google Scholar
• Sokoloff KL (1988) Inventive activity in early industrial America: Evidence from patent records, 1790–1846. J. Econom. History 48(4):813–50.Crossref, Google Scholar
• Songstad DD, Corak SJ, Pierce DA, Albertsen M (1998) Methods for maintaining sterility in plants. U.S. Patent 5,717,129, filed February 16, 1995, and issued February 10, 1998.Google Scholar
• Sørensen JB, Stuart TE (2000) Aging, obsolescence, and organizational innovation. Admin. Sci. Quart. 45(1):81–112.Crossref, Google Scholar
• Trajtenberg M (1990) A penny for your quotes: Patent citations and the value of innovations. RAND J. Econom. 21(1):172–187.Crossref, Google Scholar
• Troyer AF (1985) Hybrid corn plants with improved standability. U.S. Patent 4,607,453, filed February 21, 1985, and issued August 26, 1986.Google Scholar
• Troyer AF (1990) A retrospective view of corn genetic resources. J. Heredity 81(1):17–24.Crossref, Google Scholar
• Uhrig JW, Maier DE (1992) Costs of drying high-moisture corn. Grain Quality Fact Sheet 3, Purdue University, West Lafayette, IN.Google Scholar
• U.S. Department of Agriculture (USDA) Economic Research Service (2013) Adoption of genetically engineered crops in the U.S. data product. Accessed June 2014, http://www.ers.usda.gov/data-products/adoption-of-genetically-engineered-crops-in-the-us.aspx.Google Scholar
• Wooldridge JM (1999) Distribution-free estimation of some nonlinear panel data models. J. Econometrics 90(1):77–97.Crossref, Google Scholar