20070212賴孚權
Xiaokai Yang and Ben J. Heijdra (1993).
Monopolistic Competition and Optimum Product Diversity: Comment.
The American Economic Review, Vol.83, No.1, pp. 295-301.
Xiaokai Yang and Ben J. Heijdra (1993).
The American Economic Review, Vol.83, No.1, pp. 295-301.