Obtaining the OLS Estimates(ctd) the method of OLS(minimize SSR): min之td=∑(y-b。-bx:-b,x--bea)） bo,b,… il i- or in matrix form min SSR(b)=(Y-Xb)(Y-X6) Econometrics 15-Zhuxi @SJTU 8Econometrics 15 - Zhuxi @SJTU 8 Obtaining the OLS Estimates(ctd)         0 1 2 2 0 1 1 2 2 , ,... the method of OLS (minimize SSR): min ... ˆ or in matrix form min n n i i i i k ki b b i=1 i=1 b u y b b x b x b x SSR b Y Xb Y Xb            