A general equilibrium model of individual specialization is presented in which agents trade off the productivity and price implications of producing a narrower range of goods. Agents with highly specific skills turn out to benefit most from large markets. The model is able to replicate features...

This paper examines the evolution of a skew distribution of firm sizes from the viewpoint of the 'Bounds' approach to market structure. It confines attention to the role played by non-strategic factors (statistical independence, and cost sideeffects). A model is proposed, which leads to a...

This paper examines the frequency, pervasiveness, and determinants of product switching by US manufacturing firms. We find that one-half of firms alter their mix of five-digit SIC products every five years, that product switching is correlated with both firm- and firm-product attributes, and...

This paper proposes an equilibrium concept for a class of games in which players make irreversible costly decisions; these games have been widely used in the recent I.O. literature. The equilibrium concept is defined, not in the space of strategies, but in the space of (observable) outcomes. It...

This paper uses a difference-in-difference estimator to test whether the introduction of patient choice and hospital competition in the English NHS in January 2006 has prompted hospitals to become more efficient. Efficiency was measured using hospitals’ average length of stay (LOS) for...

This paper reviews the recent literature on game-theoretic models of market structure and their empirical implementation.

This paper traces the time series (?Growth of Firms?) tradition in the study of market structure and looks at how recent studies on entry and the size distribution of firms have modified thinking in this area.

We review the recent literature on market structure, firm strategies and public policy in network industries. In particular, we focus on the latest applied work, including case studies and empirical work as well as refinements of the established theoretical results. We group each set of results...

This paper reviews the recent literature on game-theoretic models of market structure and their empirical implementation.

This paper uses a difference-in-difference style estimation strategy to test separately the impact of competition from public sector and private sector hospitals on the efficiency of public hospitals. Our identification strategy takes advantage of the phased introduction of a recent set of...