Abstract
The rise of mega-retailers and industry concentration levels has recently generated an interest among economists and antitrust policymakers in the effects of buyer countervailing power. There exists a considerable theoretical literature offering a range of sources of powerful buyers' ability to extract price discounts. The explanations that have been tested experimentally have all found laboratory support. This paper surveys the theoretical literature on countervailing power, emphasizing experimental tests where available. The increasing policy relevance of this topic and the blossoming of theoretical models contrasted with the dearth of experimental tests point to fruitful directions for research.
Published Version
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