综合选择指数的估计 偏回归系数为: b=v-DAw 253203188「05 2.5263.75 8021300.8 0.5 6375512.25 80 116375512 3.115 0.244 0.712综合选择指数的估计           =                                        = = − − 0.712 0.244 3.115 1.3 25 63.75 51 63.75 51 12.5 63.75 1 0.5 0.5 80 80 1300.8 25 0 318.8 ˆ 2 2 2 1 2 2 2 sym b V DAw 1 偏回归系数为：