Eu demonstro que preferências convexas com curvas de indiferença afins não tem representação côncava se existirem duas curvas de indiferença não-paralelas

It is an easy task for most commodity spaces, to find examples of strictly monotonic preference relations. For example, in the space of bounded sequences of real numbers.. However, it is not easy for spaces like the space of bounded functions defined in the real interval [0, 1]. In this note we...

In this note I show that pratically any increasing function is the equilibrium bidding function of a symmetric first-price auction. It is like a Sonnenschein-Mantel-Debreu for auctions

Suppose a seller wants to sell k similar or identical objects and there are n greater than k potential buyers. Suppose that each buyer wants only one object. In this case, we suggest the use of a simultaneous auction that would work as follows. Players are asked to submit sealed bids for one...

We model a two period monopoly market with two-sided quality uncertainty. In first period, seller gathers information about consumers´ tastes upon observing its sales. In second period, seller may or may not deliver the information. If monopolist must commit either to reveal or conceal...

In this paper I prove that a quasiconcave separable utility function defined on an atomless space is concave.