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Borders and Distance in Knowledge Spillovers : Dying over Time or Dying with Age? - Evidence from Patent Citations
Li, Yao Amber - 2012
This paper uses a gravity framework to investigate the effects of distance as well as subnational and national borders in knowledge spillovers. Drawing on the NBER Patent Citations Database, we examine patent citations data at metropolitan level within the U.S. and the 38 largest patent-cited...
Persistent link: https://www.econbiz.de/10013117109
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Creative Destruction and Productive Preemption
Norback, Pehr-Johan - 2013
entrepreneurial effort allocated to high-quality invention projects. Using data on patents granted to small firms and individuals, we …
Persistent link: https://www.econbiz.de/10013087725
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Patent Breadth in an International Setting
Bond, Eric W. - 2017
patents make R&D more attractive, but the effect on static efficiency is nonmonotonic. In a North.South model, where only the …
Persistent link: https://www.econbiz.de/10012956893
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A Model of Patent Trolls
Choi, Jay Pil - 2015
This paper develops a model of patent trolls to understand various litigation strategies employed by nonpracticing entities (NPE). We show that when a NPE faces multiple potential infringers who use related technologies, it can gain a credible threat to litigate even when it has no such...
Persistent link: https://www.econbiz.de/10013013083
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Frand Royalties and Injunctions for Standard Essential Patents
Choi, Jay Pil - 2014
patents (SEPs). I analyze the effects of injunctions and potential court-imposed FRAND rates on negotiated royalty rates. The …
Persistent link: https://www.econbiz.de/10013045315
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A Theory of Patent Portfolios
Choi, Jay Pil - 2014
This paper develops a theory of patent portfolios in which firms accumulate an enormous amount of related patents in …
Persistent link: https://www.econbiz.de/10013062675
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Patent Pools, Litigation and Innovation
Choi, Jay Pil; Gerlach, Heiko A. - 2021
-competitive effects of patent pools for complementary patents naturally extend for dynamic innovation incentives. However, this simple … conclusion may not hold if we entertain the possibility that patents are probabilistic and can be invalidated in court. In such a … case, the licensing fees reflect the strength of patents. Patent pools of complementary patents can be used to discourage …
Persistent link: https://www.econbiz.de/10013315713
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How Does the Market Use Citation Data? The Hirsch Index in Economics
Ellison, Glenn - 2010
A large literature following Hirsch (2005) has proposed citation-based indexes that could be used to rank academics. This paper examines how well several such indexes match labor market outcomes using data on the citation records of young tenured economists at 25 U.S. departments. Variants of...
Persistent link: https://www.econbiz.de/10013137445
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Dynamically Optimal R&D Subsidization
Grossmann, Volker - 2010
Previous research on optimal R&D subsidies has focussed on the long run. This paper characterizes the optimal time path of R&D subsidization in a semi-endogenous growth model, by exploiting a recently developed numerical method. Starting from the steady state under current R&D subsidization in...
Persistent link: https://www.econbiz.de/10013139245
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Structural Change, Urban Congestion, and the End of Growth
Grossmann, Volker - 2011
This paper develops a two-sector R&D-based growth model with congestion effects from increasing urban population density. We show that endogenous technological progress causes structural change if there are positive productivity spillovers from the modern to the traditional sector and Engel's...
Persistent link: https://www.econbiz.de/10013118683