变量

Inno

Inno

Inno

Hp

0.8393^***

0.284^***

0.162^**

(10.95)

(4.16)

(2.57)

Pop

11.94^***

5.863^***

(9.42)

(4.45)

Hp * Pop

—

0.000736^***

(9.20)

Pcgdp

0.0388^***

0.0376^***

(6.29)

(6.76)

Fd

−3224.2^***

−2225.0^***

(−4.26)

(−3.22)

Fin

880.8^*

539.9

(1.92)

(1.30)

Sri

429.4^*

206.9

(1.83)

(0.97)

Is

−5.558

−15.74^*

(−0.54)

(−1.69)

Fit

17.32^***

9.132

(2.67)

(1.54)

时间固定

YES

YES

YES

城市固定

YES

YES

YES

样本量

420

420

420

R²

0.885

0.925

0.939