Emission Reduction Effect and Mechanism of Auto-Purchase Tax Preference

Table 2

Descriptive statistics.

Variable	Obs	Mean	Std. dev.	Min	Max
LnSO2	2969	10.413	1.127	0.693	13.434
LnWater	2973	8.401	1.132	1.946	11.421
LnSoot	2926	9.762	1.132	3.526	15.458
Time	3022	.285	0.452	0	1
LnGDP	3022	7.112	1.051	3.502	10.402
LnPop	3022	5.901	0.731	3.022	8.031
Pollution_Degree	3022	0.487	0.111	0	0.91
LnUrban	3022	3.936	0.197	3.453	4.495
LnMile	3022	2.714	0.566	0.113	3.497
LnIncome	3022	8.6	0.356	7.825	9.665
LnSale	54144	4.275	2.419	0	11.164
Price_Grade	54144	3.252	1.8	1	7
LnOil_Price	54144	4.094	0.336	3.439	4.655