(1)

(2)

(3)

(4)

(5)

(6)

(7)

Ols

Fe

Re

东部地区

中部地区

西部地区

稳健性

x1

−0.302

−1.013^***

−0.976^***

0.876^**

0.207

−1.257^***

−0.797^***

(0.234)

(0.256)

(0.240)

(0.338)

(0.689)

(0.462)

(0.214)

x2

−4.394^***

−1.348^***

−1.412^***

−0.692^*

0.198

−2.688^***

−1.111^***

(0.642)

(0.277)

(0.275)

(0.411)

(0.398)

(0.508)

(0.232)

x3

0.567

−0.326^*

−0.318^*

−0.225

−0.237

−0.143

−0.055

(0.696)

(0.181)

(0.181)

(0.194)

(0.354)

(0.354)

(0.152)

x4

−1.220

3.332^***

3.266^***

2.818^***

3.034^*

−0.218

1.277

(3.291)

(0.916)

(0.917)

(0.881)

(1.769)

(2.425)

(0.785)

x5

−0.349^***

−0.134^***

−0.136^***

−0.079^***

−0.514^***

−0.548^***

−0.032

(0.071)

(0.025)

(0.024)

(0.020)

(0.121)

(0.184)

(0.022)

−0.375^***

(0.034)

_cons

3.166^***

2.076^***

2.091^***

0.811^***

0.951^***

3.317^***

2.356^***

(0.251)

(0.114)

(0.176)

(0.215)

(0.168)

(0.176)

(0.098)

N

300.000

300.000

300.000

130.000

80.000

90.000

300.000

r2

0.282

0.319

0.345

0.409

0.590

0.530

r2_a

0.270

0.231

0.246

0.303

0.520

0.468