| 单词 | consistent preferences |
| 释义 | consistent preferences The assumption that a rational individual will choose consistently. If set A of goods is preferred to set B, and set B is preferred to set C, then for consistency A must be preferred to C. The assumption of such consistency is the basis of revealed preference. A problem arises over the time scale on which consistency is to be expected: over any short period individuals desire variety. Consistent preferences do not imply that if I choose ice cream rather than rice pudding today I must make the same choice tomorrow. Over any long period, however, individuals' needs and tastes may change. When considering the collective preferences of groups of people, as shown by voting, there is no reason to assume consistent preferences: a committee may well vote to choose A rather than B, B rather than C, and C rather than A. |
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