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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Coase conjecture ： ウィキペディア英語版 Coase conjecture The Coase conjecture, developed first by Ronald Coase, is an argument in monopoly theory. The conjecture sets up a situation in which a monopolist sells a durable good to a market where resale is impossible and faces consumers who have different valuations. The conjecture proposes that a monopolist that does not know individuals' valuations will have to sell its product at a low price if the monopolist tries to separate consumers by offering different prices in different periods. This is because the monopoly is, in effect, in price competition with itself over several periods and the consumer with the highest valuation, if he is patient enough, can simply wait for the lowest price. Thus the monopolist will have to offer a competitive price in the first period which will be low. The conjecture holds only when there is an infinite time horizon, as otherwise a possible action for the monopolist would be to announce a very high price until the second to last period, and then sell at the static monopoly price in the last period. The monopolist could avoid this problem by committing to a stable linear pricing strategy or adopting other business strategies.〔http://papers.ssrn.com/sol3/papers.cfm?abstract_id=496175 [Orbach (2004)〕 ==Simple two-consumer model== Imagine there are consumers, called $X$ and $Y$ with valuations of good with $x$ and $y$ respectively. The valuations are such as The monopolist could try to charge at a $price\; =\; y$ in the first period and then in the second period $price\; =x$, hence price discriminating. This will not result in consumer $Y$ buying in the first period because, by waiting, she could get price equal to $x$. To make consumer $Y$ indifferent between buying in the first period or the second period, the monopolist will have to charge a price of $price\; =\; dx\; +(1-d)y$ where $d$ is a discount factor between 0 and 1. This price is such as . Hence by waiting, $Y$ forces the monopolist to compete on price with its future self. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Coase conjecture」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.