COWLES FOUNDATION FOR RESEARCH IN ECONOMICS
AT YALE UNIVERSITY

Box 208281
New Haven, CT 06520-8281

Lux et veritas

COWLES FOUNDATION DISCUSSION PAPER NO. 1389

Monetary Equilibrium with Missing Markets

Pradeep Dubey and John Geanakoplos

December 2002

We consider a two-period model with missing assets and missing market links, in which money plays a central role and is linked to every instrument in the economy. If there are enough missing market links relative to the ratio of outside to inside money, then monetary equilibrium (ME) exists and money has positive value. The nonexistence of GEI (of the underlying economy) shows up as a liquidity trap in terms of the ME. In sharp contrast to GEI, the ME are generally determinate not only in terms of real, but also financial, variables.

Keywords: Bank, Money, Monetary equilibrium, Incomplete markets, Inside money, Outside money, Liquidity trap

JEL Classification: D50, E40, E50, E58