Constrained suboptimality in incomplete markets: a general approach and two applications

Alessandro Citanna (1) , Atsushi Kajii (2) , Antonio Villanacci (3)

1 GSIA, Carnegie Mellon University
2 Institute of Policy and Planning Sciences, University of Tsukuba
3 UniFI - Università degli Studi di Firenze = University of Florence = Université de Florence

In this paper we re-examine generic constrained suboptimality of equilibrium allocations with incomplete numeraire asset markets. We provide a general framework which is capable of resolving some issues left open by the previous literature, and encompasses many kinds of intervention in partially controlled market economies. In particular, we establish generic constrained suboptimality, as studied by Geanakoplos and Polemarchakis, even without an upper bound on the number of households. Moreover, we consider the case where asset markets are left open, and the planner can make lump-sum transfers in a limited number of goods. We show that such a perfectly anticipated wealth redistribution policy, though consistent with the assumed incomplete financial structure, is typically effective.

Mots clés: incomplete markets; Constrained suboptimality

Domaines: Economie et sciences de la décision

Alessandro Citanna, Atsushi Kajii, Antonio Villanacci. Constrained suboptimality in incomplete markets: a general approach and two applications. Economic Theory, 1998, Vol.11,n°3, pp.495-521. ⟨10.1007/s001990050199⟩. ⟨hal-00479390⟩