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

Table 5

Benchmark model results.

Variable	LCTCEI	LITCEI	LGTCEI	LBPR	LTGR
	(1a)	(2a)	(3a)	(4a)	(5a)
LIFT	0.0684	0.0389	0.0285	0.0011	−0.008
	(0.0058)	(0.0051)	(0.0042)	(0.0045)	(0.0034)
LRED	0.155	−0.431	−0.416	−0.620	0.0019
	(0.1751)	(0.1543)	(0.1253)	(0.1353)	(0.1038)
LRFE	2.7469	1.4071	1.1454	−0.670	−0.656
	(0.2858)	(0.2517)	(0.2045)	(0.2208)	(0.1693)
LPatent	0.0380	0.0602	0.0900	0.013	0.0239
	(0.0172)	(0.0151)	(0.0123)	(0.0133)	(0.0102)
LRID	−0.083	−0.179	−0.182	−0.154	−0.036
	(0.0270)	(0.0238)	(0.0193)	(0.0209)	(0.0160)
Constant	0.5692	0.7342	0.7432	0.8921	0.8017
	(0.1128)	(0.0994)	(0.0807)	(0.0872)	(0.0668)
Section	Yes	Yes	Yes	Yes	Yes
Year	Yes	Yes	Yes	Yes	Yes
N	800	800	800	800	800
R^2	0.3972	0.5963	0.6317	0.6337	0.6415

The parenthesis are the robust standard error values: , , and .