Table 3. Effect of air pollution on mental health, mediated by cognitive and non-cognitive ability, 2014†.
| Depression | Cognitive ability | Non-cognitive ability | Depression | |
|---|---|---|---|---|
| PM2.5 | 0.015** (0.006) |
-0.014*** (0.004) |
-0.039*** (0.005) |
0.012** (0.006) |
| Cognitive ability | -0.053*** (0.011) |
|||
| Non-cognitive ability | -0.053*** (0.009) |
|||
| Covariates | Yes | Yes | Yes | Yes |
| County/District Fixed Effects | Yes | Yes | Yes | Yes |
| Observations | 18229 | 18229 | 18229 | 18229 |
| Adjusted R2 | 0.101 | 0.574 | 0.427 | 0.104 |
†Notes: Standard errors in parentheses.
* p < 0.1
** p < 0.05
*** p < 0.01. The explanation of variables and models is the same as those in Table 2, except that mental health is measured by the Kessler Screening Scale for Psychological Distress (K6), and cognitive ability is composed of the score of word test and the score of math test.