Antitrust & Competition Policy Blog

Editor: D. Daniel Sokol
University of Florida
Levin College of Law

Thursday, July 17, 2014

Price leadership and unequal market sharing: Collusion in experimental markets

P.T. Dijkstra (Groningen University) addresses Price leadership and unequal market sharing: Collusion in experimental markets.

ABSTRACT: We consider experimental markets of repeated homogeneous price setting duopolies. We investigate the effect on collusion of sequential versus simultaneous price setting. We also examine the effect on collusion of changes in the size of each subject's market share in case both subjects set the same price. Our results show that sequential price setting compared with simultaneous price setting facilitates collusion, if subjects have equal market shares or if the follower has the larger market share. With sequential price setting, we find more collusion if subjects have equal market shares rather than unequal market shares. We observe more collusion if the follower has the larger market share than if the follower has the smaller market share.

https://lawprofessors.typepad.com/antitrustprof_blog/2014/07/price-leadership-and-unequal-market-sharing-collusion-in-experimental-markets-.html

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