Two weak restrictions on equilibrium market structures are that firms who decide to enter make sufficient profits to cover entry costs and fixed costs of production, and that no new firm could profitably enter. I examine these restrictions by the size distribution of firms in the same industry,...

Many oligopoly theories predict that there will be a positive correlation between market size and the equilibrium number of firms, and some also imply that competition is more intense in larger markets. We test these predictions with a sample of 535 driving schools in 249 markets. With an...

This paper provides a detailed examination of price responses in the Swedish gasoline market to changes in the world market price. We use daily price data from one of the leading retail chains together with input costs (spot market price and exchange rate)for the period January 1980 to December...