Using data from the Federal Trade Commission's Line of Business Program and survey measures of technological opportunity and appropriability conditions, this paper finds that overall firm size has a very small, statistically in- significant effect on business unit R & D intensity when either...

This paper analyzes R&D policies when the returns to cost-reducing and demand-creating R&D are imperfectly appropriable and market structure is endogenous. Previous characterizations of appropriability are generalized to permit the possibility that own and rival R&D are imperfect substitutes. We...

This book addresses the related problems of regulating and pricing access in network industries. Interconnection between network suppliers raises questions of how to sustain competition and realize economic efficiency. New entrants must have access to customers in a competitive industry, but the...

Combining theoretical work with careful historical description and analysis of new data sources, History Matters makes a strong case for a more historical approach to economics, both by argument and by example. Seventeen original essays, written by distinguished economists and economic...