Imperfect Competition and the Firm: Some Equivalence Results

The paper introduces an abstract economy with imperfect competition; the choice of allocation takes place through an abstract mechanism, when produceres choose strategies and the outcome is (a set of) feasible allocations, where the consumers' choices are sustained by the market mechanism at some prices. We show that with a wide range of assumptions on producer preferences, the equilibrium outcome in this economy are ordinary compensated equilibria, possibly in an economy with production externalities.