Independent variable

Coefficient (t-statistics)

Constant

19.34994 (25.84944)^***

Distance

−0.142029 (−1.534736)

Common language

−0.793246 (−4.884456)^***

RTA

1.057587 (7.064632)^***

Common border

0.780418 (1.937841)^**

Adjusted R²

0.100