In this paper we provide necessary and sufficient conditions for the existence of a Cournot equilibrium when demand is rho-linear and firms are identical and produce under constant returns to scale. We focus on inelastic and convex demand which yields non concave profit functions.We show that...

We study consumer surplus in a single market when a) there is a lower bound in the consumption of the outside good and b) the weights in the social welfare function given to consumers and firms are different. We assume quasilinear utility. When the lower bound constraint on the consumption of...

We consider a model in which agents choose a single niche to act. These niches could be different markets around the world or different contests. We look for the existence of a free entry equilibrium in which no agent wishes to switch to a different niche. When agents form a continuum,...