This paper deals with the role of bubbles, having the same meaning as Ponzi games, for implementing efficient growth paths in a closed economy overlapping generations model. It is shown that the well-known arbitrage condition for bubbles, namely that they must yield the same return in...

A variety of empirical and theoretical evidence published in recent years suggests that frictions in credit markets are crucial to understand the monetary transmission mechanism. The objective of this paper is to provide a quantitative evaluation of the credit view interpretation of this...

This paper presents a full model of the Credit Channel of the monetary transmission mechanism. In particular, the special role of the banking sector is derived endogenously and special attention is paid to the role of borrowers' net worth. A debt contracting problem with asymmetric information...

It will be shown that for rational players with a sufficiently large time horizon it is advantageous to keep promises and not to cheat even if cheating is the optimal behaviour in the short run. This explains why ethics could develop in a market economy where incentives to cheat are ubiquitous.

This paper describes a method for solving a class of forward-looking Markov-switching Rational Expectations models under noisy measurement, by specifying the unobservable expectations component as a general-measurable function of the observable states of the system, to be determined optimally...

In the standard CAPM with a riskless asset we prove existence of equilibria without assuming concavity of the investor's utility functions. Moreover, we give a uniqueness result using assumptions on the risk aversion of investors.