变量

(1)

(2)

(3)

lnEXP_ijt

lnTEL_it

lnEXP_ijt

lnDEI_it

0.315***

0.167***

0.256***

(3.73)

(3.75)

(2.89)

lnTEL_it

0.355**

(2.02)

lnGDP_it

0.564***

0.201***

0.493***

(13.92)

(9.39)

(9.23)

lnGDP_jt

0.183

−0.079

0.211

(1.20)

(−0.98)

(1.40)

lnDIS_ij

−0.451***

−0.064***

−0.429***

(−15.08)

(−4.05)

(−13.56)

lnPOP_it

0.839***

0.028**

0.829***

(36.04)

(2.32)

(35.26)

SEA

0.536***

−0.155**

0.591***

(4.69)

(−2.57)

(5.10)

cons

5.912***

−1.614*

6.485***

(3.35)

(−1.73)

(3.68)

N

120

120

120

r²

0.968

0.821

0.969