The impact of input price changes on industry concentration in a Cournot oligopoly depends on the type of firm heterogeneity and on the curvature of the demand function. Firms might be heterogeneous in their ability to use the input undergoing the price change, or in their ability to use...

This paper develops a model of technological progress in the microprocessor industry that connects the seemingly disparate engineering and economic measures of technological progress. Technological progress in the microprocessor industry is driven by the repeated adoption of higher quality...

This paper introduces an economically meaningful concept of generality of an input and defines a coefficient of technological generality, an intuitive measure of congruence in the R&D required for improving the quality of various adaptations of a general purpose input. It is shown in a...