This paper examines the structure and the evolution of the patents declared as essential for three major technical standards in information technology (MPEG2, DVD and W-CDMA). These standards have many essential patents, which are owned by many firms with different interests. Many patents have...

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...

We explore the consequences of the utility requirement for patents on speed of innovation. Basic research output, that has no immediate appli-cation except for as a step to further research, may not be patentable be-cause it does not fulfill the utility requirement of patentability....

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,...