研討日期

2010年06月26日11:30 ~ 13:00

研討地點

台大社會科學院26教室

題目

Differentiated duopoly with asymmetric costs

作者

Piercarlo Zanchettin

文獻出處

Journal of Economics & Management Strategy, 2006,

報告人

曾靜枝

參加人員

梁文榮、吳芝文、莊復賢、劉亮君、徐靖、曾靜枝、丁虹仁、高國峯、陳宏易、王羿傑、鐘暳陵、陳金盛、施姵全、張民忠、王光正

摘要

In this paper, the authors compare Bertrand and Cournot equilibria in a differentiated duopoly with linear demand and cost functions. This paper extends the Singh and Vives (1984) model by allowing for a wider range of cost and demand (product quality) asymmetry between firms. Focusing on the case of substitute goods, it shows that both the efficient firms’ profits and industry profits are higher under Bertrand competition when asymmetry is strong and/or products are weakly differentiated. Therefore, Singh and Vives’s ranking of profits between the two modes of competition is reversed in a sizeable portion of the relevant parameter space. Contrary to the standard result with symmetric firms, it also shows that product differentiation can reduce both the efficient firm;s and industry profits, implying that a local incentive towards less differentiation may arise.

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