Repeated trade and the velocity of money

Pradeep Dubey, Siddharta Sahi, Martin Shubik

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


There are two sources of inefficiency of strategic equilibria (SE) in market mechanisms. The first is the oligopolistic effect, which occurs when an agent can single-handedly influence prices. With a continuum of agents we get 'perfect competition' and this effect is, of course, wiped out. But the inefficiency of SEs may nevertheless persist because agents are not 'perfect liquid', i.e., the constraints of the mechanism are such that they cannot carry out arbitrary trades at the market prices. Our main result is a formal proof of the fact that, if enough repeated rounds of trade are permitted within a single utility period, then the liquidity problem is overcome: SE outcomes turn out to be not only efficient but, in fact, Walrasian.

Original languageEnglish (US)
Pages (from-to)125-137
Number of pages13
JournalJournal of Mathematical Economics
Issue number2
StatePublished - 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Economics and Econometrics
  • Applied Mathematics


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