Monday, February 25, 2013


Posted by D. Daniel Sokol

ADITYA BHATTACHARJEA, Delhi School of Economics, University of Delhi and UDAY BHANU SINHA, Delhi School of Economics, University of Delhi have an interesting working paper on MULTI-MARKET COLLUSION WITH TERRITORIAL ALLOCATION.

ABSTRACT: This paper develops a supergame model of collusion between price-setting oligopolists located in different markets separated by trade costs. The firms produce a homogenous good and sustain collusion based on territorial allocation of markets. We first show, in a more general framework than some earlier literature, that a reduction in trade costs can paradoxically increase the sustainability of collusion. Then we prove a new paradox where the scope for collusion may be enhanced by an increase in the number of firms. We discuss several implications for trade and antitrust policy in this context.

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