Table 6.
Robustness checks.
| (1) | (2) | (3) | (4) | (5) | (6) | |
|---|---|---|---|---|---|---|
| Placebo test of advancing the shock by one period | Excluding very poor and very wealthy households | Excluding students with poor physical health | Excluding students whose father or mother (or both) received tertiary education | Excluding students whose father or mother (or both) is a teacher, doctor, or other professional technician | Additional control variables | |
| COVID-19*Post | 2.4017*** | 2.3981*** | 2.2440*** | 2.5326*** | 2.1030*** | |
| (0.6517) | (0.6401) | (0.7224) | (0.6838) | (0.6430) | ||
| [1.12, 3.68] | [1.14, 3.65] | [0.83, 3.66] | [1.19, 3.87] | [0.84, 3.36] | ||
| COVID-19*Post_1 | −0.8067* | |||||
| (0.4145) | ||||||
| [−1.62, 0.01] | ||||||
| Control variables | Yes | Yes | Yes | Yes | Yes | Yes |
| Additional control variables | No | No | No | No | No | Yes |
| City fixed effect | Yes | Yes | Yes | Yes | Yes | Yes |
| Year fixed effect | Yes | Yes | Yes | Yes | Yes | Yes |
| R-squared | 0.1135 | 0.1145 | 0.1008 | 0.1104 | 0.1127 | 0.1331 |
| N | 12,096 | 11,487 | 11,865 | 9,541 | 10,909 | 12,096 |
***, **, * indicate significance at the levels of 1, 5, and 10%, respectively. The explained variable in all columns is Psychological problems. Robust standard errors are presented in parentheses. Post_1 represents that the variable Post advances one period. 95% confidence intervals are reported in brackets.