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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 Exponential discounting ： ウィキペディア英語版 Exponential discounting In economics exponential discounting is a specific form of the discount function, used in the analysis of choice over time (with or without uncertainty). Formally, exponential discounting occurs when total utility is given by :$U(\backslash \_^)=\backslash sum\_^\backslash delta^(u(c\_t)),$ where ''c''''t'' is consumption at time ''t'', $\backslash delta$ is the exponential discount factor, and ''u'' is the instantaneous utility function. In continuous time, exponential discounting is given by :$U(\backslash \_^)=\backslash int\_^\; e^u(c(t))\backslash ,dt,$ Exponential discounting implies that the marginal rate of substitution between consumption at any pair of points in time depends only on how far apart those two points are. Exponential discounting is not dynamically inconsistent. For its simplicity, the exponential discounting assumption is the most commonly used in economics. However, alternatives like hyperbolic discounting have more empirical support. ==See also== *temporal discounting *hyperbolic discounting *intertemporal choice 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「Exponential discounting」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.