WELFARE ENHANCING COORDINATION IN CONSUMER COOPERATIVES UNDER MIXED OLIGOPOLY

Marco Marini, Paolo Polidori, Désirée Teobaldelli and Alberto Zevi

Annals of Public and Cooperative Economics, 2015, vol. 86, issue 3, 505-527

Abstract: The recent globalization of world economies has led the retail markets of developed countries towards increasing levels of integration and strategic interdependence. A non negligible share of retail and food markets is currently served by co-operative societies. Consistently with this trend, the consumer cooperatives have recently experienced increasing levels of integration. The main aim of this paper is to study the welfare effects of coordination among consumer cooperatives competing in quantities in a mixed oligopoly against profit-maximizing firms. We show that, in absence of agency problems, under increasing or constant returns to scale a higher output coordination of the consumer cooperatives does not affect the total welfare as long as a nonnegative profit constraint holds in these firms. On the other hand, under decreasing returns to scale, the consumer cooperatives contribute more to social welfare when acting on behalf of all consumers. This is because, by coordinating consumers’ preferences, these firms can reduce their market output, thus helping the market to come closer to the first best. All together these results seem to provide an argument in favour of the recent process of integration involving consumer cooperatives in many developed countries.Journal: Annals of Public and Cooperative Economics

Date: 2015
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Related works:
Working Paper: Welfare enhancing coordination in consumer cooperatives under mixed oligopoly (2014)
Working Paper: Welfare Enhancing Coordination in Consumer Cooperatives under Mixed Oligopoly (2013)
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