This paper presents a discrete time version of the Romer 1986 model of endogenous growth. The purpose of this work is to propose detailed and simple proofs of existence of optimal solutions and of a competitive equilibrium. The framework implemented here reduces the complexity of the proofs...

This paper constructs a growth model in which monopolistically competing firms choose the characteristic of their own product from an unbounded product space. While consumers wish to satisfy various needs by purchasing a diverse range of goods, production costs are lower for those goods that are...

This paper constructs a growth model in which monopolistically competing firms choose the characteristic of their own product from an unbounded product space. While consumers wish to satisfy various needs by purchasing a diverse range of goods, production costs are lower for those goods that are...

In this paper, from the excess utility function we obtain a binary relation in the social weights space and then, for an infinite dimensional economy, we prove the existence of equilibrium in our approach we don't suppose the existence of a demand function. Finally, we obtain a condition for the...

This paper presenta a general equilibrium model of imperfect competition in which firm efficiency depends on the level of product market competition. X-efficiency is shown to arise to the extent unions directly affect the level of employment. A positive relationship is established between total...

The paper examines some issues linked to the integration of market power in general equilibrium. The first part reviews the different existing approaches: subjective and objective, in terms of quantities and in terms of prices. The second part presents a semi-competitive model, based on a sector...

Two basic properties concerning the dynamic behavior of competitive equilibria of exchange economies with complete markets are derived essentially from the fact that the Walras correspondence has no knots.

The paper examines some issues linked to the integration of market power in general equilibrium. The first part reviews the different existing approaches : subjective and objective, in terms of quantitites and in terms of prices. The second part presents a semi-competitive model, based on a...

This paper studies competitive equilibria in economies characterized by the presence of asymmetric information, where non-exclusive contracts with payoffs dependent on the agents' private information are traded on competitive markets. For such economies competitive equilibria may not exist with...