. 2020 Aug 21;28(1):775–788. doi: 10.1007/s11356-020-10483-y

Table 3.

Regression results of the individual pollutant of the RD design

	AQI	PM_2.5	PM₁₀	SO₂	CO	NO₂	O₃
E	− 13.0645*** (4.6807)	− 6.4310** (2.5974)	− 11.6415*** (3.7881)	− 0.9533** (0.4526)	− 0.0156 (0.0351)	− 3.0033 (1.9149)	− 10.3751* (6.0390)
N	627	627	627	627	627	627	627
R²	0.4009	0.2547	0.3273	0.1823	0.2044	0.5201	0.6087

AQI

PM_2.5

PM₁₀

SO₂

NO₂

O₃

− 13.0645***

(4.6807)

− 6.4310**

(2.5974)

− 11.6415***

(3.7881)

− 0.9533**

(0.4526)

− 0.0156

(0.0351)

− 3.0033

(1.9149)

− 10.3751*

(6.0390)

627

R²

0.4009

0.2547

0.3273

0.1823

0.2044

0.5201

0.6087

Note: *, **, and *** respectively indicate significance levels of 10%, 5%, 1%. The data of Chengdu is deleted here