商品的价格提高，整体的购买力下降(收入效应)，消费者转向购买相对价格低的商品(替代效应)。
As the price of a commodity rises, overall purchasing power decreases (the income effect) and consumers move toward relatively less expensive goods (the substitution effect).
增加城镇低收入者的收入具有相对高的增加消费的效应。
Increasing the income of the urban low income colony has a relatively high effect of increasing consumption.
所得税对储蓄行为的影响是积极的还是消极的，取决于税收储蓄的收入效应与替代效应的相对大小。
Weather the income tax influence on saving behavior is positive or negative depends on the net effect of income effect and substitute effect resulted by the tax saving.
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