模型1

模型2

模型3

模型4

模型5

模型6

X1

0.0458***

(2.84)

0.0424**

(2.59)

0.0169

(1.250)

0.0479***

(2.970)

0.0458***

(2.800)

0.0444***

(2.750)

X2

0.0496

(1.17)

X3

−0.0806***

(−5.470)

X4

0.162

(1.240)

X5

−0.00473

(−0.160)

X6

0.00109

(1.130)

_cons

−0.566

(−1.56)

−0.487

(0.192)

0.228

(−1.33)

−0.619*

(−1.710)

−0.563

(−1.540)

−0.538

(−1.490)

N

45

45

45

45

45

45

R2

0.1381

0.1841

0.4844

0.1488

0.1181

0.1437

F

8.05***

4.74**

21.67***

4.85**

3.95**

4.69**