2.模型 C,=&+a1Π，+a2Π，-1+Q3(W,+WG)+Eu L,=B。+B1Π，+B2Π-1+B3K,-1+82 Wer=Yo+y(Y+T-WG)+r2(Y-1+T-1-WG-1)+Y3t+83 Y,=C,+I,+G,-T Π，=Y-Wp-Wc K=I,+K-1 ⒉模型 Ct =  + t + t− + WPt +WGt + t  0 1 2 1 3 1 ( ) I t =  +  t + t− + Kt− + t  0 1 2 1 3 1 2 W Y T W Y T W t Pt = + t + t − Gt + t− + t− − Gt− + + t      0 1 2 1 1 1 3 3 ( ) ( ) Yt = Ct + I t + Gt − Tt t = Yt −WPt −WGt Kt = I t + Kt−1