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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 Social cost ： ウィキペディア英語版 Social cost Social cost in economics may be distinguished from "private cost".〔J. de V. Graaff, 1987. "social cost," ''The New Palgrave: A Dictionary of Economics'', v. 4, pp. 393-95. (Abstract ).    • Alan V. Deardorff. ("Social cost," ) and ("Private cost," ) ''Glossary of International Economics''.〕 Economic theorists model individual decision-making as measurement of costs and benefits. Social cost is also considered to be the private cost plus externalities.〔(【引用サイトリンク】url=http://tutor2u.net/economics/content/topics/externalities/what_are_externalities.htm )〕 Rational choice theory often assumes that individuals consider only the costs they themselves bear when making decisions, not the costs that may be borne by others. With pure private costs, the costs carried by the individuals involved are the only economically meaningful costs. The choice to purchase a glass of lemonade at a lemonade stand has little consequence for anyone other than the seller or the buyer. The costs involved in this economic activity are the costs of the lemons and the sugar and the water that are ingredients to the lemonade, the opportunity cost of the labour to combine them into lemonade, as well as any transaction costs, such as walking to the stand. ==Implications== If there is a negative externality, then social costs will be greater than private costs. Environmental pollution is an example of a social cost that is seldom borne completely by the polluter, thereby creating a negative externality. If there is a positive externality, then one will have higher social ''benefits'' than private'' benefits''. For example, when a supplier of educational services indirectly benefits society as a whole but only receives payment for the direct benefit received by the recipient of the education: the benefit to society of an educated populace is a positive externality. In either case, economists refer to this as market failure because resources will be allocated inefficiently. In the case of negative externalities, private agents will engage in too much of the activity; in the case of positive externalities, they will engage in too little. (The marginal rate of transformation in production will not be equal to the marginal rate of substitution in consumption due to the effect of the externality and as a result Pareto optimality will not occur—see welfare economics for an explanation.) 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「Social cost」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.