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A commitment device is, according to journalist Stephen J. Dubner and economist Steven Levitt, "a means with which to lock yourself into a course of action that you might not otherwise choose but that produces a desired result".〔 Put differently, a commitment device is a "way to change one's own incentives to make an otherwise empty promise credible".〔 A commitment device is a technique where someone makes it easier for themselves to avoid akrasia (acting against one's better judgment), particularly procrastination. ==Overview== The term "commitment device" is used in both economics and game theory. In particular, the concept is relevant to the fields of economics and especially the study of decision making (Brocas, ''et al.''). A common example comes from mythology: Odysseus' plan to survive hearing the sirens' song without jumping overboard. Economist Jodi Beggs writes "Commitment devices are a way to overcome the discrepancy between an individual's short-term and long-term preferences; in other words, they are a way for self-aware people to modify their incentives or set of possible choices in order to overcome impatience or other irrational behavior. You know the story of Ulysses tying himself to the mast so that he couldn't be lured in by the song of the Sirens? You can think of that as the quintessential commitment device" (Beggs 2009). Behavioral economist Daniel Goldstein describes how commitment devices established in "cold states" help an agent guard against impulsive decisions in later, emotional, stimulated, "hot states". Goldstein says that, despite their usefulness, commitment devices nevertheless have drawbacks. Namely, they still rely on some self control.〔TED talk - Daniel Goldstein on the battle between your present and future self, http://www.ted.com/talks/daniel_goldstein_the_battle_between_your_present_and_future_self〕 Goldstein says that, for one, a commitment device can promote learned helplessness in the agent. If the agent enters a situation where the device does not incentivize commitment, the agent may lack sufficient will or ability to control themselves. (Goldstein uses the example of a cake falling into the grey area of a diet, so it is eaten excessively.) Second, commitment devices can usually be reversed. (An unplugged distracting electronic can be plugged back in.) 〔 Goldstein says "In effect you are like Odysseus and the first mate in one person. You're binding yourself, and then you're weasling your way out of it, and then you're beating yourself up for it afterwards."〔 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「Commitment device」の詳細全文を読む スポンサード リンク
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