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Table 9 Estimation results of the IV ordered probit model

From: Determining the effect of air quality on activities of daily living disability: using tracking survey data from 122 cities in China

Variable

(1)

(2)

(3)

(4)

First-stage

lnSO2

Second-stage ADL

First-stage

lnNO2

Second-stage ADL

First-stage

lnPM10

Second-stage ADL

First-stage

lnAQI

Second-stage ADL

Mineral endowment

18.0074***(0.3361)

 

6.4223***

(0.2497)

 

7.9056***

(0.2517)

 

1.8217***

(0.1610)

 

lnSO2

 

−0.2086***

      
 

(0.0481)

      

lnNO2

   

−0.5079***

    
   

(0.1249)

    

lnPM10

     

−0.4492***

  
     

(0.1048)

  

lnAQI

       

−1.8083***

       

(0.3437)

Serious illness

 

0.0195*

 

0.0192*

 

0.0225**

 

0.0201**

 

(0.0106)

 

(0.0104)

 

(0.0105)

 

(0.0095)

Depression

 

0.0744***

 

0.0722***

 

0.0896***

 

0.0811***

 

(0.0106)

 

(0.0104)

 

(0.0106)

 

(0.0105)

Self-reported health

 

0.0366***

 

0.0360***

 

0.0331***

 

0.0295***

 

(0.0089)

 

(0.0087)

 

(0.0088)

 

(0.0080)

Body disability

 

−0.3027***

 

−0.2968***

 

−0.2951***

 

−0.2653***

 

(0.0163)

 

(0.0164)

 

(0.0163)

 

(0.0210)

Physical pain

 

−0.0214**

 

−0.0210**

 

−0.0243***

 

−0.0216***

 

(0.0084)

 

(0.0082)

 

(0.0083)

 

(0.0076)

Individual / Year

 

YES

 

YES

 

YES

 

YES

|α/β|

 

10.6974

 

26.4531

 

19.9644

 

89.9652

First stage F value

2870.47

 

661.23

 

976.54

 

128.13

128.13

Adjust R2

0.0736

 

0.0180

 

0.0263

 

0.0035

0.0035

Observations

26,218

26,218

26,218

26,218

26,218

26,218

26,218

26,218

  1. Abbreviations: AQI Air Quality Index, SO2 Sulfur Dioxide, NO2 Nitrogen Dioxide, PM10 Inhalable Particles
  2. Note: Standard errors are in brackets; *** p < 0.01, ** p < 0.05, * p < 0.1. The control variable results are not listed here