Cournot (Duopoly) v.s. Monopoly: Space Does Matter
2006/01/10
研討會日期 : 2006-01-10
時間 : 15:00
主講人 : Prof. Liu, Chorng-Jian
地點 : B棟110室
演講者簡介 : Prof. Liu, Chorng-Jian為日本筑波大學社會經濟規劃研究所博士（1989）。
現為台北大學經濟系教授。
其主要研究領域為產業經濟學及管制經濟學。
演講摘要 : The original Cournot (1838) model assumes that firms and market locate at the same point and thus transportation costs are nil. Once considering the market and firms are spatially separated, the consequence profits, consumer surplus, and social welfare may be different to the spaceless model. This paper shows that the “distance effect” is not neutral in consumer surplus and producer profit. Therefore, in some cases, duopoly is welfare superior to the monopoly in the original Cournot model, but spatial duopoly is welfare inferior to the spatial monopoly. This result may be applied to antitrust judgments.
