研討日期

2004年6月5日上午10:00 ~ 下午1:00

研討地點

台大經濟系201教室

討論文獻

題目

作者

文獻出處

Network Externalities, Competition, and Compatibility

Michael L. Katz and Carl Shapiro

American Economic Review, 1985, June, 424-440.

報告人

王光正

參加人員

黃鴻、邱俊榮、林燕淑、楊雅博、王光正、吳芝文、陳更生、李揚、黃 璀娟、朱維愷、郭子綾、 蔡爵丞、

討論提要

We discussed what the network externalities effects are first. Followed by the definition of Katz and Shapiro (1985) , the network externalities effects come from three sources. First, the consumption externalities may be generated through a direct physical effect of the number of purchasers on the quality of the product. Second, the network externalities may come from equipment support systems. For example, when more the software is supported, more the utility consumers can get from purchasing a computer. Third, positive consumption externalities arise for a durable good when the quality and availability of post purchase service for the good depend on the experience and size of the service network.

We discussed Katz and Shapiro’s the model afterwards. Katz and Shapiro built their model form a fundamental work. I introduced what the Fulfilled Expectations Cournot Equilibrium is and how to get the equilibrium in the monopoly and oligopoly market.

結論

Under the Fulfilled Expectations Cournot Equilibrium, Katz and Shapiro can solve the equilibrium in the monopoly and oligopoly market with network externalities. Their paper is a milestone in network economics.

延伸研究

備註