Emission Reduction Effect and Mechanism of Auto-Purchase Tax Preference

Table 4

Quantileregression results of purchase tax incentives on SO₂ emissions.

	(1)	(2)	(3)	(4)
	20%	40%	60%	80%
	LnSO2	LnSO2	LnSO2	LnSO2
Time	−0.791	−0.792	−0.754	−0.645
	(−14.27)	(−15.35)	(−16.31)	(−15.15)
Constant	9.844	10.51	10.98	11.42
	(345.48)	(396.11)	(462.39)	(521.61)
Obs	3092	3092	3092	3092

Note: t statistics are in parentheses. ^∗ < 0.10, ^∗∗ < 0.05, and ^∗∗∗ < 0.01.