One of the most enduring controversies in antitrust concerns the potential foreclosure effects of vertical integration. In a recent paper, Ordover, Saloner and Saloner and Salop (1990) construct a model of vertical integration in which vertical foreclosure emerges as the equilibrium outcome....

We examine the endogenous formation of research coalitions among symmetric firms. In our model, the number of research joint ventures and their sizes are determined endogenously. Members of a research coalition set their R amp; D investments in order to maximize the aggregate profits of members...

This paper studies stable structures of efficiency-enhancing joint ventures among symmetric firms. Efficiency gains that accrue to a joint venture are assumed to increase with its size. The socially efficient industry-wide joint venture is the stable outcome when membership of a joint venture is...

We develop an equilibrium model of vertical foreclosure with the choice of input specifications. Vertical foreclosure occurs as the upstream division of the integrated firm makes a specialized input for its sister downstream division while it would, as an independent firm, provide a generalized...

This paper offers an explanation of policy reforms undertaken in times of an economic crisis. Our explanation does not depend either on conflicts of interests between different socio-economic groups, or on the informational imperfection about the effectiveness of the current policy regime. The...