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Bounding the effects of proxy variables on instrumental-variables coefficients. (English) Zbl 0638.62112
Instrumental-variables models are considered in which one of the observed variables is a proxy for some unobserved true variable. The smallest correlation between the proxy and the unobserved true variable is computed, such that it is guaranteed that a coefficient’s sign has not been reversed by substituting the proxy.
Reviewer: J.Wolters

MSC:
62P20 Applications of statistics to economics
62J99 Linear inference, regression
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