Using annual US data for gross domestic product originating by sector between 1947 and 1997 it is shown that a negative long-run relationship between inflation and the markup is present across the sectors as well as in the aggregate. A preliminary explanation based on indutry structure is...

We study the enforcement of competition policy against collusion under Leniency Programs, which gave reduced fines to firms revealing information ot the Antitrust Authority. Such programs give firms an incentive to break collusion, but may also have a pro-collusive effect, since they decrease...

In this paper the authors analyze the interaction of two disciplinary mechanisms: competition and reputation. They first study a dynamic model of monopolistic competition with experiencs goods (i.e., quality is observed after goods are purchased). When market power is high enough, reputation...

This paper tackles the issue of optimum product diversity in an impoerfeclty competitive market with small or large firms. First, it develops a quadratic utility model of monopolistic competition with horizontal product differentiation which avoids some of the main pitfalls of the S-D-S...

We assess the phenomenon of excess volatility in intra-day foreign exchange markets using a market microstructure approach. Introducing different degrees of competition in the forex market and applying different learning mechanisms we are able to give a rationale for traders' use of rather...

We consider a homogenous good oligopoly with identical consumers who learn about prices either by (sequentially) visiting firms or by consulting a price agency who sells information about which firm charges the lowest price.