变量

(1)

(2)

(3)

东部地区

中部地区

西部地区

DIFI

0.0159^***

0.0145^***

−0.0066

(0.0037)

(0.0052)

(0.0084)

lnGDP

−0.0212^***

0.0024

−0.0003

(0.0042)

(0.0067)

(0.0095)

Foreign

0.0021

0.0048

−0.0386^***

(0.0034)

(0.0135)

(0.0121)

Is

−0.0145

−0.0388^**

0.0823^***

(0.0146)

(0.0170)

(0.0172)

Urb

−0.1524^***

−0.3868^***

−0.1175^**

(0.0163)

(0.0612)

(0.0495)

Edu

−0.0583

1.3256^***

−0.6086

(0.2350)

(0.3461)

(0.3761)

Innov

1.7745^***

9.5753^***

5.5589^**

(0.4222)

(1.7578)

(2.7127)

常数项

0.4016^***

0.3183^***

0.0304

(0.0579)

(0.0761)

(0.0999)

个体效应

YES

YES

YES

时间效应

YES

YES

YES

N

121

88

121

R²

0.971

0.985

0.975