The conventional view of science-based businesses focuses on the inseparability of the roles of the inventor generating the underlying idea and the Schumpeterian entrepreneur who implements it in practice. We present an equilibrium model of science-based entrepreneurship where scientific ideas...

We present a model of science-based entrepreneurship where ideas initially produced by researchers with high-level knowledge capital may be developed by high-ability entrepreneurs. With moderate investment costs, startups continuously managed by inventors-founders coexist in equilibrium with...

The number of requests for patent examination showed a significant increase of 83% from 1997 to 2007 in Japan, while the number of patent applications increased by only 1%. This paper aims at theoretically and empirically analyzing the causes of recent "explosion" of examination requests,...

A significant part of the patents held by a firm are not used. We show that, given the uncertainty of invention quality at the patent application stage and the sunk cost incurred for obtaining and developing a patent, the patent (internal) utilization rate declines with the (anticipated) size of...

We examine why cooperation among essential patent holders for a standard may not occur, despite significant gains for patent holders and users of the standard. Utilizing Maskin's (2003) framework, we show that a grand coalition can be implemented only if the number of patent holders (n) is...

We examine empirically how patent quality in terms of forward citation and science linkage affect the market value of a firm. We find that both indicators affect the market value of a firm significantly even if we extensively control the effects of the other major determinants of the market...

The recent empirical studies on innovation and market value suggest that R&D has a strong complementarity with market share in the market valuation of firms. Blundell, Griffith and Reenen (1999) argue that it represents the strategic preemptive effect, while Hall and Vopel (1997) suggest a...

We provide an economic analysis of two types of research exemptions: (1) experimentation and research on the patented subject matter, and (2) academic (or non-commercial) research with the patented invention. We find that exemption for research on improving or inventing-around the subject matter...

Identifying whether an exogenous factor affects R&D from a demand side or from a supply side is an important issue. This paper, first, theoretically shows that a favorable change in either side can reduce the R&D productivity in equilibrium, so that the reduced form estimation cannot provide a...