pool

年份固定RE

国家固定FE

LagDV

Student

0.078*** (4.807)

0.083*** (6.13)

0.027*** (2.49)

0.008 (0.773)

GDP

0.844*** (20.97)

0.715*** (20.47)

1.866*** (55.71)

0.310*** (5.723)

Distance

−0.424*** (−6.06)

−0.384*** (−6.56)

Area

−0.019 (−0.698)

−0.022 (−0.999)

contig

0.838*** (5.751)

0.594*** (4.813)

population

0.142*** (3.806)

0.241*** (7.568)

0.030 (0.134)

0.210 (0.954)

IGDP

0.631*** (9.278)

0.463*** (7.912)

0.896*** (15.14)

0.187*** (3.323)

inflation

−0.113*** (−2.62)

−0.112*** (−2.95)

−0.035** (−2.03)

0.002 (0.147)

Export(−1)

0.669*** (23.439)

常数

2.647***(16.34)

2.772*** (20.42)

−0.889*** (−7.9)

0.572*** (4.563)

R2

0.84

0.89

0.99

0.99

样本数

673

673

687

643