URL des Cahiers : https://halshs.archives-ouvertes.fr/CAHIERS-MSECahiers de la Maison des Sciences Economiques 2006.68 - ISSN 1624-0340This paper studies a simple stochastic two-period general equilibrium exchange model with money, an incomplete market of nominal assets, and a competitive banking system, intermediate between consumers and a Central Bank. There is a finite number of agents, consumers and banks. Default is not permitted. The public policy instruments are, besides real taxes implicit in the model, public debt and creation of money both implemented at the first period. The equilibrium existence is established under a Gains to trade hypothesis and the assumption that banks have a non zero endowment of money at each date-event of...