变量

模型1

模型2

模型3

模型4

模型5

模型6

模型7

IID-1

0.942***

0.945***

0.806***

0.786***

0.804***

0.783***

0.770***

(267.47)

(236.21)

(82.51)

(116.47)

(101.17)

(158.19)

(60.45)

Pgdp

0.0147***

0.00516***

−0.00151***

−0.0151***

−0.00997***

−0.0109***

−0.00895***

(32.29)

(18.98)

(−9.19)

(−10.08)

(−8.9)

(−5.88)

(−5.88)

$Pgd{p}^2$

−0.000310***

−0.000718***

−0.000857***

0.000611***

0.000523***

0.000435***

−15.38

(8.38)

(11.12)

(9.49)

(5.69)

(5.83)

Ubn

−0.315***

0.275***

0.206***

−0.190***

0.154***

(13.38)

(10.94)

(11.45)

(9.04)

(7.45)