现在，我引入不确定性和预防性储蓄的影响。
预防性储蓄理论认为不确定性对居民消费有负效应。
Precaution saving theory suggests that uncertainty have a negative effect on consumption.
不过，当雨天来临时，你拥有的应对选择越多，你也就越不需要预防性储蓄。
But the more options you have when a rainy day arrives, the less you need precautionary saving.
城镇居民家庭的预防性储蓄动机要大于农村居民家庭的预防性储蓄动机；
The precautionary motivation of urban resident household is stronger than the rural resident household.
理论上，此类投入应该降低中国居民很高的预防性储蓄，促进消费水平——这是过去五年间的关键政策目标。
Such spending measures should, in theory, reduce the high level of precautionary savings and lift consumption, a key policy aim of the past five years.
乘法回归来检验流动性约束和预防性储蓄假说，并且没有区分长期消费与短期消费之间的关系。
But many economists use static OLS regression method to test Precautionary savings and Liquidity constraints hypo these and some of them mixed long-run and short-run.
我国学者利用西方的消费理论对这种现象进行了研究，尤其近几年以预防性储蓄理论进行研究的较多。
The Chinese researchers has studied this phenomena by means of the western consumption theory. These years more and more researchers use the theory of precautionary saving to study this issue.
从本质上讲，预防性储蓄理论说的是，更多的不确定性会降低平均消费倾向(APC)，即比消费与收入的比率。
Essentially, what the precautionary-saving literature says is that more uncertainty reduces the average propensity to consume (APC), the ratio of consumption to income.
从本质上讲，预防性储蓄理论说的是，更多的不确定性会降低平均消费倾向(APC)，即比消费与收入的比率。
Essentially, what the precautionary-saving literature says is that more uncertainty reduces the average propensity to consume (APC), the ratio of consumption to income.
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