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<FONT face=新宋体>Assume that the only supplies of bread and cigarettes in a prinsoner-of-war camp are controlled by thr commandant and that POW is given 4 loaves of bread and 4 packs of cigarettes at the start of each week. The prisonerers are allowed to trade among themselves and we observe that one particular prinsoner trades bread for cigarettes atthe going prices so  that  during the first week he consumers 5 packs of cigarettes and 3 loaves of bread.  In the next week for some reason, we find that the going price has changed and this prinsoner finds aftertrading, his preferred consumption is (1)7 packs of cigarettes and 2 loaves of bread <BR>(2)2 packs of cigarettes and 5 loaves of bread <BR>(3)2 packs of cigarettes and 7 loaves of bread <BR>under these three conditions above respectively, how would you rank the three situations(original 4 packs of cigarettes and 4 loaves of bread, the final consumption in the first week , the final consumption in the second week) </FONT><BR><BR>不太明白以什么标准rank,大家帮忙给点建议

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关键词：respectively consumption Controlled themselves Conditions

1，用两块面包换来三包烟。2，用两包烟换来一块面包。3，用两包烟换来三块面包。多多益善的话，3肯定比2好。或许可以认为他对香烟的偏好大面包。那么3比1又好。我也是初学者，说错了请见谅

显然囚犯十偏好烟的，1〉3〉2

rank 的标准是效用。

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