Theory predicts that optimal effective corporation tax rates will be negatively related to industry specific sunk costs, and hence industry concentration. Governments should tax industries with monopolistic power softly. Evidence suggests that this Schumpeterian (1942) principle of corporate...

This paper provides an alternative real options framework to assess how firms' strategic interaction under imperfect competition a¤ects the industrial dynamics of investment, concentration, and expected returns. When firms have similar production technologies, the cross sectional variation in...

This paper analyses a dynamic game of investment in R&D or advertising, where current investments change future market conditions. It investigates whether underinvestment can be supported in equilibrium by the threat of escalation in investment outlays. When there are no spillovers, or there is...

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.