英语翻译To address this problem,we substitute (3) into (1) to obtain .Our identifying assumption implies that Pi and Si are uncorrelated with the composite residual,yVi + Ei.Thus (4) can be estimated by instrumental variables,with Pi and Si (and
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![英语翻译To address this problem,we substitute (3) into (1) to obtain .Our identifying assumption implies that Pi and Si are uncorrelated with the composite residual,yVi + Ei.Thus (4) can be estimated by instrumental variables,with Pi and Si (and](/uploads/image/z/2855029-13-9.jpg?t=%E8%8B%B1%E8%AF%AD%E7%BF%BB%E8%AF%91To+address+this+problem%2Cwe+substitute+%283%29+into+%281%29+to+obtain+.Our+identifying+assumption+implies+that+Pi+and+Si+are+uncorrelated+with+the+composite+residual%2CyVi+%2B+Ei.Thus+%284%29+can+be+estimated+by+instrumental+variables%2Cwith+Pi+and+Si+%28and)
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