Signs

Variables Measurement

Mean

Std. Dev.

Max.

Min.

Kurtosis

Skewness

Obs.

Outcome variables

pob1

Oil production (million barrels)

712.43

131.29

918.66

450.97

−0.762

−0.419

42

pob2

Gas Production (BSCF)

1722.03

842.61

2991.44

536.51

−1.469

0.090

42

Main explanatory variables

tl

Technology licenses registered

128.67

48.694

261

52

0.067

0.685

39

Other controlling variables

trd

Trade volume-imports ($’billion)

27.877

26.797

89.778

2.130

−0.554

0.866

42

inc

Income (constant 2015 $’billion)

266.40

144.04

518.48

114.54

−1.240

0.643

42

int

Interest rate (%)

13

3.959

26

6

1.911

0.762

41

inf

Inflation rate (%)

18.735

16.513

72.836

5.388

2.938

1.963

42