Question: In Section 17.33 verify that in the just-identified case the 2SLS estimator b2sls simplifies as claimed: b1 and b2 are the fixed effects estimator. b1
In Section 17.33 verify that in the just-identified case the 2SLS estimator b¯2sls simplifies as claimed: b¯1 and b¯2 are the fixed effects estimator. b°1 and b°2 equal the 2SLS estimator froma regression of bu on Z1 and Z2 using X 1 as an instrument for Z2.
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