We investigate a mixed market where a state-owned welfare-maximizing public firm competes against profit-maximizing private firms. We use a circular city model with quantity-setting competition. In contrast to a pure market case discussed by Pal (1998a), spatial agglomeration of private firms...

I investigate the effect of exclusive territories, which are typical vertical controls imposed by upstream firms. Using shipping spatial models, I consider an industry that consists of many independent local markets. An upstream monopolist restricts competition between downstream firms using...

We investigate optimal taxsubsidy policies in mixed and private oligopolies with excess burden of taxation. We compare the optimal subsidies and the resulting welfare levels among four regimes: mixed and private Cournot duopolies and Stackelberg competition with public and private leaderships....

This paper analyzes the situation in which a national government introduces environmental regulations. Within the framework of an international duopoly with environmental regulations, an environmental tax imposed by the government in the home country can induce a foreign firm with advanced...