Entry, Exit, and the Endogenous Market Structure in Technologically Turbulent Industries

Empirical studies have found high correlation between entry and exit across industries, indicating that industries differ substantially in their degree of firm turnover. I propose a computational model of dynamic oligopoly with entry and exit in a turbulent technological environment. I examine how industry-specific factors give rise to across-industries differences in turnover. An analysis of the endogenous relationships between firm turnover, industry concentration, and the performance variables shows: (1) the rate of turnover and industry concentration are positively related; (2) industry concentration and market price are positively related; (3) no general relationship exists between industry concentration and price-cost margin.