Markets are incomplete when the assets available to the agents do not span the space of future contingencies. Efficiency is then assessed by the weak criterion of "constrained efficiency" (efficiency relative to the set of allocations compatible with the asset structure). That criterion requires...

With the current sovereign debt crisis, the incompleteness of economic integration in the Economic and Monetary Union (EMU) has become patent leading to an intense debate among academics and policy makers. Most of the debate focuses on the needs to strengthen fiscal rules and to restore fiscal...

This paper proves existence of a multiplicity of equilibria in a 2-period TGE model with money and nominal rigidities. Households have in- complete preferences and firms reach decisions through the “control principle” (cf. Dr`eze 1989).