Table 8.

Model substitution test and bilateral abbreviated tail test.

Variables	Model 1	Model 2	Model 3
	OLogit	Regress	OProbit
PM10	0.014 **	0.007 ***	0.009 **
	(0.006)	(0.003)	(0.005)
PM102	−6.023 × 10−5 **	−3.022 × 10−5 **	−3.404 × 10−5 *
	(2.852 × 10−5)	(1.323 × 10−5)	(2.062 × 10−5)
Observations	7143	7143	5911
Pseudo R2	0.043	0.105	0.007

Note: ***, ** and * indicate significance at 1%, 5% and 10%, respectively.