变量

${\text{IP}}_{t_0}$

${\text{IP}}_{t_1}$

模型1

模型2

模型3

模型4

OA

1.819^***

1.732^***

2.865^***

2.713^***

(5.814)

(5.520)

(7.075)

(6.684)

IN

2.640^***

2.601^***

3.120^***

3.052^***

(50.18)

(48.35)

(45.83)

(43.86)

PA3

0.919^***

0.918^***

0.765^***

0.764^***

(118.5)

(118.4)

(76.23)

(76.12)

NS

0.0884^***

0.0883^***

0.108^***

0.108^***

(3.290)

(3.290)

(3.113)

(3.114)

ND

43,743^***

42,535^***

71,624^***

69,520^***

(3.243)

(3.154)

(4.103)

(3.984)

EO

−366.6^***

−350.5^***

−528.8^***

−500.8^***

(−13.86)

(−13.06)

(−15.45)

(−14.42)

RO

−406.8^***

−396.1^***

−585.7^***

−567.1^***

(−14.93)

(−14.45)

(−16.61)

(−15.99)

G

−416.8^***

−400.7^***

−597.8^***

−569.8^***

(−11.75)

(−11.20)

(−13.02)

(−12.31)

SH

71.83^***

125.2^***

(3.444)

(4.638)

Constant

12.12

−67.32

3.969

−134.4

(0.116)

(−0.627)

(0.0292)

(−0.968)

Observations

12,062

12,062

12,062

12,062

R-squared

0.723

0.723

0.580

0.581

Ajusted R2

0.581

0.581

0.581

0.581