Variable

Full sample

Low-income countries

Middle-income country

High-income countries

lntrdis

−0.388***

−0.11*

−1.091***

−0.221

(−0.134)

(−0.163)

(−0.312)

(−0.284)

ci

−0.023***

−0.004

−0.015

−0.088***

(−0.008)

(−0.009)

(−0.013)

(−0.027)

tight

1.638**

0.064

4.823***

7.102***

(−0.750)

(−0.509)

(−1.740)

(−4.700)

tec

0.02

0.001

0.037***

0.072***

(−0.010)

(−0.009)

(−0.011)

(−0.02)

lnla

−3.161***

−4.419**

−0.825**

−1.62

(−0.821)

(−2.031)

(−0.376)

(−1.63)

lngdp

6.425***

7.865***

1.400***

2.954**

(−0.706)

(−1.724)

(−0.096)

(−1.299)

na

0.006**

0.122**

0.001

0.053

(−0.007)

(−0.059)

(−0.01)

(−0.063)

gd

−0.313*

−0.67*

−0.231

−1.103*

(−0.372)

(−0.436)

(−0.32)

(−0.776)

gud

1.346***

0.06*

−0.051**

−1.177*

(−0.374)

(−0.544)

(−0.411)

(−0.777)

_cons

−33.719***

−16.897***

8.935*

−8.593

(−4.792)

(−6.016)

(−4.752)

(−13.551)

R²

0.523

0.7

0.5103

0.415

F

25.89

29.54

14.47

21.98