Spatial Discrimination: Bertrand vs. Cournot with Asymmetric Demands
2004/11/16
研討會日期 : 2004-11-16
時間 : 15:00
主講人 : Prof. Liang, Wen-Jung
地點 : B棟110室
演講者簡介 : Prof. Liang, Wen-Jung為台灣大學經濟學博士。
現淡江大學產業經濟系教授兼系主任。
其主要領域為區域經濟學、國貿理論、產業經濟學。
演講摘要 : This paper develops a spatial model with homogeneous product and asymmetric demand structure to compare the delivered prices, aggregate profits and social welfare between Cournot and Bertrand competition. It focuses on the impacts caused by the asymmetric demand curves and differential transport costs. It shows that the market-size effect stemming from asymmetric demand structure is crucial in determining firms’ locations under Cournot competition, but insignificant under Bertrand competition. Moreover, when either market is excessively large, the equilibrium price of the large market is likely to be higher under Bertrand than under Cournot competition if the maximum transport cost (the cost of shipping a unit of output between the two markets) is high. Aggregate profits may be higher under Bertrand than under Cournot if the maximum transport cost is high. Also, social welfare under Cournot competition may exceed that under Bertrand competition if one of the markets is excessively large and the maximum transport cost is high. These results are in sharp contrast with the ones obtained in the existing literature.
