Emission Reduction Effect and Mechanism of Auto-Purchase Tax Preference

Table 3

Baseline regression results.

	(1)	(2)	(3)	(4)	(5)	(6)
	LnSO2	LnSO2	LnWater	LnWater	LnSoot	LnSoot
Time	−0.614	−0.378	−0.305	−0.293	−0.0726	−0.469
	(−27.06)	(−10.82)	(−17.80)	(−11.01)	(−2.72)	(−11.53)
LnGDP		−0.0956		0.374		0.232
		(−0.97)		(4.97)		(2.04)
Pollution_Degree		1.431		−1.046		−0.493
		(4.49)		(−4.30)		(−1.34)
LnUrban		1.630		−0.519		0.732
		(4.62)		(−1.93)		(1.80)
LnMile		0.124		−0.934		0.585
		(0.48)		(−4.74)		(1.97)
LnPop		−0.0676		−0.0542		−0.0723
		(−0.63)		(−0.67)		(−0.59)
LnIncome		−0.720		−0.118		0.179
		(−4.60)		(−0.99)		(0.99)
Constant	10.58	10.34	8.485	12.24	9.782	2.908
	(886.80)	(9.15)	(942.94)	(14.20)	(691.98)	(2.23)
City FE	Yes	Yes	Yes	Yes	Yes	Yes
Time FE	Yes	Yes	Yes	Yes	Yes	Yes
Obs	2969	2969	2973	2973	2926	2926

t statistics are in parentheses.  < 0.10,  < 0.05, and  < 0.01.