变量

M1

M2

M3

M4

M5

M6

M7

M8

截距项

−2.530^***

(−4.585)

0.441

(0.740)

EC

0.743^***

(21.934)

0.409^***

(15.604 )

0.486^***

(18.423)

0.424^***

(17.171)

0.491^***

(18.431)

0.472^***

(19.172)

0.497^***

(17.937)

0.480^***

(19.128)

PGDP

0.499^***

(11.699)

0.389^***

(14.051)

0.417^***

(13.036)

0.391^***

(13.245)

0.441^***

(12.640)

0.427^***

(12.909)

0.441^***

(12.316)

0.428^***

(12.842)

POP

−0.259^***

(−10.881)

−0.151^***

(−9.465)

−0.159^***

(−6.723)

−0.153^***

(−6.988)

−0.197^***

(−7.624)

−0.179^**

(−6.956)

−0.201^***

(−7.559)

−0.184^***

(−7.062)

ER

0.128^***

(6.076)

0.044^***

(3.171)

0.0677^***

(5.0573)

0.047^***

(3.757)

0.0363^***

(3.113)

0.032^***

(2.847)

0.036^***

(3.010)

0.031^***

( 2.753)

URB

0.464^***

(3.460)

−0.084

(−0.972)

0.190

(1.507)

−0.001 (−0.011)

−0.119

(−0.864)

−0.026

(−0.197)

−0.131

( −0.917)

−0.038

(−0.279)

RD

−0.070^*

(−2.030)

−0.011

(0.489)

−0.043

(1.467)

−0.074^***

(2.692)

−0.117^***

(3.551)

−0.098^***

(3.154)

−0.121^***

(3.528)

−0.101^***

(3.181)

$\rho$

0.613^***

(25.123)

0.104^**

(2.534)

0.377^***

(10.571)

$\nu$

0.882^***

(51.199)

0.707^***

(21.114)

0.880^***

(50.410)

0.744^***

(24.398)

$R^2$

0.737

0.901

0.908

0.929

0.616

0.897

0.627

0.905

Log-L

107.916

161.110

252.125

160.755

233.713

169.019

246.079