Heterogeneity of Green TFP in China’s Logistics Industry under Environmental Constraints

Table 2

Descriptive statistical results of input-output variables.

Variable types	The variable name	Unit	Sample size	Mean	Median	Standard deviation	Minimum	Maximum
“Good” output	Real added value	One hundred million yuan	450	880.08	665.89	773.76	38.91	5141.41
“Bad” output	CO2 emissions	Ten thousand tons of	450	1679.39	1377.87	1268.89	90.03	7958.30
Input	The number of labor	Ten thousand people	450	23.52	21.44	14.22	2.81	85.40
	The capital stock	One hundred million yuan	450	3614.44	2813.75	2911.78	229.66	16844.09
	Energy consumption	Ten thousand tons of	450	942.29	765.91	645.80	51.05	3495.89