What effect is working when the price of a good falls and consumers tend to buy

游客2025-06-20 22

问题 What effect is working when the price of a good falls and consumers tend to buy it instead of other goods?______.

选项 A、The income effect
B、The substitution effect
C、The diminishing marginal utility effect
D、None of the above

答案 B

解析答案为B项。一种商品的价格变化对商品的需求量的影响可以分解为替代效应(substitution effect)和收入效应(income effect)两个部分。其中，因商品的价格变动引起的商品相对价格的变动，使得消费者在保持原有效用水平不变的条件下用较为便宜的商品代替较昂贵商品而对商品需求量产生的影响，为替代效应；在收入不变的条件下，由商品的价格变动会引起消费者实际收入水平变动，消费者改变消费数量而对商品需求量所产生的影响，为收入效应。本题提及商品的价格下降将使该商品相对其他替代商品更有吸引力，为替代效应在起作用，故选B项。

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