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Cumulative innovation is central to economic growth. Do patent rights facilitate or impede such follow-on innovation? This paper studies the causal effect of removing patent protection through court invalidation on subsequent research related to the focal patent, as measured by later citations....

In Japan, as in many developed countries, the government's agencies for science have implemented several reforms to the scientic research system, which has concentrated research resources in the top research universities. However, the growth of research papers has stagnated in Japan during the...

This paper examines what drives author ordering in scientific research. We first discussa theoretical framework for the choice between alphabetical ordering and relative-contribution-based ordering and develop hypotheses, focusing on the nature of research, in particular, the importance of...

By exploring the patterns of laser-diode technological development in the U.S. and Japan and theoretically examining market conditions and institutions that promote entrepreneurial spin-outs from a parental company, this study reveals how the existence and absence of entrepreneurial spin-out...

There are various factors associated with success or failure of R&D projects, such as maturity of the technology, circumstances surrounding R&D systems within companies and environments for commercialization of R&D projects. For R&D projects supported by public funds in particular, it has been...

We investigate how a deferred patent examination system promotes ex-ante screening of patent applications, which reduces both the number of granted patents and the use of economic resources for examinations, without reducing the return from R&D. Based on a real option theory, we develop a model...