How Many Firms Should Be Leaders? Beneficial Concentration Revisited
AbstractWe investigate the relationship between the Herfindahl-Hirschman Index (HHI) and welfare. First, we discuss the model wherein m leaders and N - m followers compete. Daughety (1990) finds that under linear demand and constant marginal cost, the Stackelberg model yields larger welfare and HHI than the Cournot model. Thus, he demonstrates that beneficial concentration occurs. We find that this always occurs under general cost and demand functions when m is sufficiently large, but does not always occur when m is small. Next, we consider the free entry of followers, and find that beneficial concentration always occurs regardless of m. In particular, the more persistent the leadership, the more likely it is to be beneficial.
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Bibliographic InfoArticle provided by Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association in its journal International Economic Review.
Volume (Year): 53 (2012)
Issue (Month): 4 (November)
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Other versions of this item:
- Hiroaki Ino & Toshihiro Matsumura, 2009. "How Many Firms Should Be Leaders? Beneficial Concentration Revisited," Discussion Paper Series 48, School of Economics, Kwansei Gakuin University, revised Oct 2009.
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- Etro, Federico, 2013. "Advertising and search engines. A model of leadership in search advertising," Research in Economics, Elsevier, vol. 67(1), pages 25-38.
- Marcella Scrimitore, 2010.
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- Federico Etro, 2014. "Some thoughts on the Sutton approach," Journal of Economics, Springer, vol. 112(2), pages 99-113, June.
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