Variable

Mean

Std. Dev.

Min

Max

X_ijt (USD)

3.77e+08

6.40e+08

2.85e+07

2.71e+09

EP_it

0.40

0.49

0

1

EP_jt

1.55

2.17

0

6.85

GDP_it (Trillion yuan)

6.21

0.73

5.18

7.35

GDP_jt (Billion USD)

34984.32

60507.40

540

229,935

POP_it (Ten thousand people)

6005.20

429.37

5442

6540

POP_jt (Ten thousand people)

9892.92

9756.63

410

33,292

GD_ij (km)

9488.40

4574.76

1023

17,999

BR_jt

0.30

0.46

0

1