SOLVED: 1. Consider simple linear regression model (y on z) without an intercepty = x w.points) Derive -the OLS estimator of 3 points) Show that a is unbiased. 3 points) Is TSS ESS RSS? Show it explicitly: 3 points) Obtain Var(a) (2 points If the true model is y = @0 Q13 W and you forgot to include the intercept Is in part (a) unbiased /consistent? Explain in detail. (6 points) If the true model is y = Az 4221 v where 21 is exogenous but is endogenous, derive the IV estimato

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SOLVED: Part 2: Interpretation of OLS regression Consider the following OLS regression output:reg Vage educ exper tenureSourcesSMSNumber of obs F(3, 522) Prob R-squared Adj R-squared Root MSE526 76 . 87 0 . 0000 0 . 3064 0 . 3024 3 . 0845MHodel Residual2194.1116 4966. 30269731. 370532 522 9 . 51398984Total7160 41429525 13.6388844wageCoef .Std. Err.P> |t|[958 Conf Interval]educ exper tenure cons5989651 0223395 1692687 ~2.8727350512835 0120568 0216446 728964311.68 1.85 7 . 82 -3.94000 064 000 0004

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