Table 2:
Impact of NPI speed on COVID-19 deaths per 100,000 residents
| Model specification | Baseline | Control for testing | Control for other NPI speed | Control for mobility |
|---|---|---|---|---|
| Column | (1) | (2) | (3) | (4) |
| Postct × NPI speedc | −0.0019*** | −0.0020*** | −0.0013*** | −0.0013*** |
| (0.0002) | (0.0002) | (0.0002) | (0.0002) | |
| State test results per 100,000 | 0.0003*** | 0.0003*** | 0.0003*** | |
| (0.0000) | (0.0000) | (0.0000) | ||
| Postct × Other NPI speedc | −0.0012*** | −0.0018*** | ||
| (0.0001) | (0.0001) | |||
| Mobility | −0.000001 | |||
| (0.00005) | ||||
| Observations | 215,073 | 215,073 | 215,073 | 141,480 |
| R-squared | 0.083 | 0.088 | 0.089 | 0.127 |
| Dependent variable mean | 0.070 | 0.070 | 0.070 | 0.100 |
Notes: *** p<0.01, ** p<0.05, * p<0.1. All regressions include a constant term, date, and county fixed effects. Standard errors are in parentheses and clustered at the county level. This table reports the estimates from Eq. (1) using daily COVID-19 deaths occurring between February 15, 2020, and April 23, 2020. Column (2) controls for state-level testing, column (3) further controls for the speed of adopting other NPIs, and column (4) controls for residential mobility. The estimates reported in column (4) use daily COVID-19 deaths for 2260 counties with mobility data for the period March 1, 2020, to April 23, 2020. We re-estimated the models presented in columns (1) to (3) using this restricted sample, as shown in Panel A of Table 8 in the Appendix. While our estimates increase in magnitude in the first two columns, the estimates from our preferred specification in column (3) are nearly identical