Table 2.
Description of variables.
| Variables | Description | Mean | St. dev. | |
|---|---|---|---|---|
| Dependent variable | ||||
| CBM | CBM flow of seniors from Hong Kong to Shenzhen | 30.15 | 21.05 | |
| Independent variables | ||||
| Day | Daily code for each day in the period of study | 92 | 52.85 | |
| Stage | Stage #1 | The intervention at the time point of the Warning Stage | 0.05 | 0.22 |
| Stage #2 | The intervention at the time point of the Freezing Stage | 0.17 | 0.38 | |
| Stage #3 | The intervention at the time point of the Adjustment Stage | 0.36 | 0.48 | |
| Stage #4 | The intervention at the time point of the recovery Stage | 0.17 | 0.38 | |
| Time | Time #1 | Daily code for each day after the intervention of the Warning Stage | 0.20 | 1.04 |
| Time #2 | Daily code for each day after the intervention of the Freezing Stage | 2.54 | 6.73 | |
| Time #3 | Daily code for each day after the intervention of the Adjustment Stage | 11.72 | 19.36 | |
| Time #4 | Daily code for each day after the intervention of the recovery Stage | 2.71 | 7.04 | |
| Age | Middle-old age dummy | 1: Seniors aged 60–64; 0: other old groups. | 0.33 | 0.47 |
| Old age dummy | 1: Seniors aged 65 and older; 0: other old groups. | 0.33 | 0.47 | |
| Control variables | ||||
| Case | HK_case | New COVID-19 cases in Hong Kong | 5.92 | 12.54 |
| SZ_case | New COVID-19 cases in Shenzhen | 2.48 | 7.37 | |
| SFHoliday | Spring Festival holiday dummies (1: from January 24 to February 2, 2020; 0: other days.) | 0.07 | 0.25 | |
| Day of Week | Weekly dummies, includes Monday to Saturday | 0.14 | 0.35 | |
| Gender dummy | 1: Female; 0: Male. | 0.50 | 0.50 | |