Robert Porter

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  • Research Showcase, Cmu, Lee G Branstetter, Mariko Sakakibara, Lee Branstetter, Wesley Cohen +9 others
  • 2001
Does an expansion of patent scope induce more innovative effort by firms? We examine responses to the Japanese patent reforms of 1988. Interviews with practitioners and professional documents for patent agents suggest the reforms significantly expanded the scope of patent rights. However, econometric analysis using both Japanese and U.S. patent data on 307(More)
  • Thomas N Hubbard, Tim Bresnahan, Judy Chevalier, Andrew Dick, Kevin Murdock, Randy Kroszner +9 others
  • 2001
Moral hazard exists in expert service markets because sellers have an incentive to shade their reports of buyers' condition to increase the short-run demand for their services. The California vehicle emission inspection market offers a rare opportunity to examine how reputational incentives work in such a market. I show that consumers are 30% more likely to(More)
  • Allan Collard-Wexler, Robert Porter, Michael Whinston, Aviv Nevo, Shane Greeenstein I, Lynn Riggs +4 others
  • 2009
This paper presents a quantitative model of productivity dispersion to explain why inefficient producers are slowly selected out of the ready-mix concrete industry. Measured productivity dispersion between the 10th and 90th percentile falls from a 4 to 1 difference using OLS, to a 2 to 1 difference using a control function. Due to volatile productivity and(More)
We examine the incentives for firms to voluntarily disclose otherwise private information about the quality attributes of their products. In particular, we focus on the case of differentiated products with multiple attributes and heterogeneous consumers. We show that there exist certain configurations of consumers' multi-dimensional preferences under which(More)
Review panels determine the success or failure of most proposals, and grant writers are well advised to polish their prose in a manner that will win their approval. Indeed, many successful grant writers count their service on review panels among the most powerful learning experiences in their own research careers. There is abundant information on how review(More)
Preventives are sold ex ante, before disease status is realized, while treatments are sold ex post. Even if the mean of the ex ante distribution of consumer values is the same as that ex post, the shape of the distributions may differ, generating a difference between the surplus each product can extract. If, for example, consumers differ only in ex ante(More)
  • V Joseph, Hotz Ucla, Mo Xiao Ucla, Dan Ackerberg, Harold Demsetz, Ginger Zhe +7 others
  • 2002
In this paper, we examine the incentives for firms to voluntarily disclose otherwise private information about quality attributes of differentiated products when those products have multiple attributes and consumers are heterogeneous in their tastes over these attributes. In particular , we focus on whether the so-called " unraveling result " —in(More)
  • Jorge Lemus, Emil Temnyalov, Kevin Bryan, Gonzalo Cisternas, Erik Hovenkamp, Elliot Lipnowski +2 others
  • 2015
Patent Assertion Entities (PAEs) play an increasingly important role in business strategy , innovation, and litigation. Their strategic advantage in litigation comes from the ability to fend off counter-suits. We develop a model of R&D competition, bargaining and litigation to study the channels through which 'patent privateering' (whereby a PAE asserts(More)
Experienced grant writers know that reviewers are quick to decide whether they like or do not like the proposals they are reading. Therefore, much of the success of any given proposal rides on the strength of the first page—its capacity to " sell " the research idea to skeptical reviewers. This paper describes a writing technique designed to elicit a(More)
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