变量

(1)

(2)

(3)

seg

0.0259^***

(8.11)

0.0022^**

(2.07)

0.0024^**

(2.33)

lnstu

0.0436

(1.20)

0.0228

(0.64)

lngov

0.6289^***

(45.51)

0.5266^***

(22.98)

lnexpo

0.1339^***

(5.50)

lncap

−0.0077

(−0.54)

C

10.1713^***

(184.03)

0.8837^***

(3.00)

2.1978^***

(5.95)

N

468

468

468

R²

0.0649

0.4768

0.5998