在两时期模型的框架内，试考虑每个时期收入完全相等的两个家庭。由于偏好不同，家庭1储蓄100美元，而家庭2则储蓄1000美元。如果利率提高。哪一个家庭更有可能增加储蓄？为什么？ In the framework of the two—period model，consider two households which receive exactly thesame income in each period．Because of differences in preferences，however，household 1 saves$1 00 whereas household 2 saves $ 1，000．Which household is more likely to increase its savings if the interest rate rises？Why？