We consider a general equilibrium model under imperfect competition. Firms have constantreturns, they are price taker in the input market and compete à la Cournot in theproduct market. We assume a representative consumer exists. We show that an increase inthe number of firms of a given market...

This note shows that a general oligopolistic equilibrium (GOLE), a notionrecently introduced in the literature by Neary, may be Pareto-efficient. Consequently,at a GOLE, the allocation of resources can be identical to thatof a competitive equilibrium. We also propose a characterization of...

This paper considers a competitive insurance market under moral hazard and adverseselection, in which both the agent’s preventive effort and self protection costs are unobservableby the insurance companies. We show that the results of the adverse selection model(Rothschild and Stiglitz (1976))...

We study horizontal partial acquisitions in an oligopolistic industry in the absence of synergies.Contrary to existing results, we …nd that a dominant shareholder may choose to acquire sharesin a competitor although the aggregate pro…t of the group of …rms under his control, and eventhe...