4.用间接最小二乘法估计消费方程 C =元10+九11C1-1+π12G,+81 Y,=元20+元21C1-1+π2G+62 元10=996.4507 元20=1291.152 元11=0.968812 元21=1.258635 元12=0.237809 元22=2.794436 1=元12/元22=0.085101 2=元11-C1元21=0.861701 ,=元10-立1元20=886.5724 ⒋用间接最小二乘法估计消费方程 C C G Y C G t t t t t t t t = + + + = + + +    − −         10 11 1 12 1 20 21 1 22 2 ˆ 0.237809 ˆ 0.968812 ˆ 996.4507 12 11 10 = = =    ˆ 2.794436 ˆ 1.258635 ˆ 1291.152 22 21 20 = = =    ˆ ˆ ˆ ˆ 886.5724 ˆ ˆ ˆ ˆ 0.861701 ˆ ˆ ˆ 0.085101 0 10 1 20 2 11 1 21 1 12 22 = − = = − = = =           