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楼主: scapesuperman
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[学科前沿] 有人能解释一下何种情况应选proxy variable 还是instrumental variable |
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初中生 66%
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回帖推荐gingerlinger 发表于6楼 查看完整内容 An instrumental variable is used to help estimate a causal effect (or to alleviate measurement error). The instrumental variable must affect the independent variable of interest, and only affect the dependent variable through the independent variable of interest. This is called an exclusion restriction.
A proxy variable is a variable you use because you think it is correlated with the variable ...
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