Especially when there only exists external habit formation, an increase in the growth of the economy has a positive effect on saving rate.
本文发现当外部习惯形成影响存在时，经济增长会对储蓄率的变动有正向作用，消费者的自身消费具有负的社会效应。
The positive effect of the present invention is that: (1) external is amplified by the gear ratio of the gear components to form stronger pullout force;
本发明的 积极效果是：（1）通过齿轮部件的齿轮比将外力放大从而形成强大的拉出力；
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