I will attach my question.

Exercise 12.20 The model is Jv'i = Ii-Jr-S'r [Lit-91'}: D. An economist wants to obtain the 281.5 estimates and standard errors for '3. He uses the following steps 0 Regresses x; on 2;, obtains the predicted values if. 0 Regresses y; on if, obtains the coefcient estimate 3 and standard error 5(3) from this regression. Is this correct? Does this produce the 2515 estimates and standard errors