e) Consider the following model: Y ; = B. + B2Yzi + BZli+u; 2i li Assume that cov(Y2,u;) #0 and cov( Z 1,4;)=0. Explain
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e) Consider the following model: Y ; = B. + B2Yzi + BZli+u; 2i li Assume that cov(Y2,u;) #0 and cov( Z 1,4;)=0. Explain
e) Consider the following model: Y ; = B. + B2Yzi + BZli+u; 2i li Assume that cov(Y2,u;) #0 and cov( Z 1,4;)=0. Explain in detail how you would test the relationship between the instrumental variable 2, and the endogenous regressor Y,.
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