Interpretation of regressions with multiple proxies

被引:69
作者
Lubotsky, Darren [1 ]
Wittenberg, Martin
机构
[1] Univ Illinois, Urbana, IL 61801 USA
[2] Univ Cape Town, ZA-7700 Rondebosch, South Africa
关键词
D O I
10.1162/rest.88.3.549
中图分类号
F [经济];
学科分类号
02 ;
摘要
Multiple proxy variables are typically available for an unobserved explanatory variable in a regression. We provide a procedure by which the coefficient of interest can be estimated from a regression in which all the proxies are included simultaneously. This estimator is superior in large samples to the common practice of creating a summary measure of the proxy variables. We examine the relationship between parents' income and children's reading test scores in the United States, and between parents' assets and children's school enrollment in India, and demonstrate that the reduction in attenuation bias from a better use of proxy variables can be significant.
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页码:549 / 562
页数:14
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