研討日期

2004214日上午10:00 ~ 13:00

研討地點

台大社會科學院第二教室

討論文獻

題目

作者

文獻出處

Spatial Discrimination: Bertrand vs Cournot with Asymmetric Markets

 

Wen-Jung Liang

Working paper

報告人

梁文榮

參加人員

黃鴻、林燕淑、邱俊榮、胡均立、楊雅博、吳世傑、王光正、陳更生、許淑煐、蔡爵丞、郭子綾、陳秀華、梁文榮

討論提要

This paper develops a spatial model with duopolists competing in sales of a homogeneous product in two asymmetric markets to compare the prices, aggregate profits, consumer surplus and social welfare between Bertrand and Cournot competition.  The focus of this paper is on the impacts caused from the asymmetric demand curves and the transport costs.

結論

This paper shows that as either market is excessively larger, the equilibrium price of the larger market under Bertrand competition may be higher than under Cournot competition if the transport costs are sufficiently large.  Bertrand aggregate profits are higher than Cournot aggregate profits if the transport costs are sufficiently high, while lower if the condition is reversed.  Cournot social welfare may exceed Bertrand social welfare, if the demand structure is excessively asymmetric and the transport costs are sufficiently high.

延伸研究

1.      The difficulty faced in this paper is how to match the mathematic expression with the market-size effect and competition effect.

2.      If the mathematic expression could not match well, it would be worthy of considering another functional form of the demand curves for featuring the asymmetric markets.

3.      We should discuss the comparison of the Cournot and Bertrand social welfare with a more general form.

備註

 

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