The Impacts of Freight Trade on Carbon Emission Efficiency: Evidence from the Countries along the “Belt and Road”

Table 3

Descriptive statistics of variables.

Variable	N	Mean	St. Dev.	Min	Median	Max
GDP	800	376952.6	1109152	1170.191	62797.23	10534527
CO2	800	350200.2	1075537	1543.807	61985.13	10291927
Labor	800	34761	124804.4	2	4683.2	772500
Capital	800	114810.1	406878.3	640.3	15277.35	4927496
Energy	800	2409.021	1458.53	322.9993	2361.099	7370.653
LIFT	800	2.176	1.4626	0.1233	2.1045	4.7775
LFDI	800	0.2089	0.1599	0.0131	0.1647	0.5664
LRED	800	0.1479	0.0419	0.0836	0.1523	0.2227
LRFE	800	0.0274	0.0351	0.0000	0.0086	0.1185
LPatent	800	0.378	0.4784	0.0252	0.1826	1.8142
LRID	800	3.5177	0.2358	2.906	3.5346	3.8991