(1)

(2)

(3)

替换解释变量

缩尾

Ols

Digital

−0.004^***

−0.665^***

−1.362^***

(0.001)

(0.180)

(0.170)

urb

−4.007^***

−3.245^***

−0.365

(0.781)

(1.054)

(0.298)

pergdp

0.016

−0.136

0.229^**

(0.137)

(0.144)

(0.098)

open

0.845^***

0.700^***

1.234^***

(0.176)

(0.192)

(0.141)

ind

−0.397^**

−0.378

−0.831^***

(0.170)

(0.233)

(0.122)

_cons

4.514^***

4.453^**

0.202

(0.992)

(1.771)

(0.810)

N

248.000

248.000

248.000

r2

0.954

0.953

0.612

r2_a

0.945

0.944

0.604