We provide an asymptotic distribution theory for a class of Generalized Method of Moments estimators that arise in the study of differentiated product markets when the number of observations is associated with the number of products within a given market. We allow for three sources of error: the...

Technological change and deregulation have caused a major restructuring of the telecommunications equipment industry over the last two decades. We estimate the parameters of a production function for the equipment industry and then use those estimates to analyze the evolution of plant-level...

We explore two complementary approaches to counterfactual analysis in an empirical ATM network example with multiple equilibria. First we simply enumerate and compare the possible equilibria. Second, we examine how different learning algorithms select among them.

This paper develops a relatively simple method for computing the Markov Perfect Equilibria of dynamic games with asymmetric information (see Maskin and Tirole (1992, 2001)). We consider a class of dynamic games in which there is finite number of active players in each period, each characterized...

With applied work in mind, we define an equilibrium notion for dynamic games with asymmetric information which does not require a specification for players' beliefs about their opponent types. This enables us to define equilibrium conditions which, at least in principal, are testable and can be...

Patent counts are very imperfect measures of innovative output. This paper discusses how additional data--the number of years a patent is renewed and the number of countries in which protection for the same invention is sought--can be used to improve on counts in studies that require a measure...