Variable | First stage | Second stage |
---|---|---|
URRBMI | IADL disability | |
(1) | (2) | |
Participation rate of URRBMI at the community level | 0.9863** | Â |
(0.0210) | Â | |
URRBMI | Â | -0.3419** |
 | (0.1180) | |
Age | 0.0006 | 0.0355** |
(0.0007) | (0.0039) | |
Gender | 0.0040 | -0.3371** |
(0.0122) | (0.0713) | |
Marital status | 0.0157 | 0.1438 |
(0.0183) | (0.1007) | |
Residency area | -0.0082 | -0.0582 |
(0.0124) | (0.0724) | |
Education status | 0.0342* | -0.2801** |
(0.0159) | (0.0838) | |
Household income | 0.0032 | -0.0407** |
(0.0019) | (0.0109) | |
PM2.5 concentrations | 0.0001 | -0.0009 |
(0.0004) | (0.0023) | |
Having tap water | 0.0055 | -0.4436** |
(0.0157) | (0.0840) | |
Constant | -0.0952 | -1.7003** |
(0.0576) | (0.3176) | |
Number of observations | 1,924 | 1,924 |
F test | 257.08** | Â |
R-squared | 0.5473 | Â |
Adj R-squared | 0.5451 | Â |
Wald chi-squared | Â | 199.00** |
Wald test of exogeneity | Â | 0.19 |