We present a model with firms selling (homogeneous) products in two imperfectly segmented markets (a "high-demand" and a "low-demand" market). Buyers are mobile but restricted by transportation costs, so that imperfect arbitrage occurs when prices differ in both markets. We show that equilibria...

In this paper we use a simple median voter model to analyze the effects of tax systems with differing degrees of progressivity. We find that relatively high taxes on middle incomes have two important advantages: on the one hand, they help to ensure that all citizens are better off than they...

This paper evaluates the effects of modifying price cap regulation when firms are allowed to use non-linear tariffs. We consider a stylized network industry and analyze price cap regulation combined with rate of return regulation and with a universal service obligation. While both modifications...

Cross-supplies describe the phenomenon that two or more firms in the same industry supply each other with their final products. A prominent example is the cooperation in the European flat glass industry, which was recently criticized by the European Commission. In a simple model we try to...

We analyse the subgame perfect equilibrium of a four stage game in a model of vertical product differentiation, where the consumer's evaluation of a product depends on its inherent quality and on its network's size. First, two firms choose their product's inherent quality. Then they may mutually...

Review of: Regulations, Institutions, and Commitment. Comparative Studies of Telecommunications. Ed. by Brian Levy, Pablo T. Spiller. 1996. Cambridge University Press: Cambridge