Table 2.
Regression results for the impact of required vaccination on COVID-19 cases at colleges and universities (per 100,000 student population), considering those that required vaccination after the beginning of the Fall semester.
| Model 1 | Model 2 | Model 3 | ||
|---|---|---|---|---|
| Main independent variables | ||||
| F21 (Fall 2021) | 1,023** | 1,023** | 857 | |
| (500) | (452) | (683) | ||
| R’ (Duration of vaccine requirement) | 435 | 951** | 1,600*** | |
| (521) | (482) | (535) | ||
| F21*R’ (the coefficient of interest) | -1,777** | -1,777*** | -1,709** | |
| (737) | (667) | (676) | ||
| Institution-level control | ||||
| Historical Cases (F20) per population | 0.33*** | 0.26*** | ||
| (0.05) | (0.06) | |||
| Student Population | -0.03*** | -0.02* | ||
| (0.01) | (0.01) | |||
| State-level control | ||||
| State cases per capita | 0.07 | |||
| (0.23) | ||||
| State Fixed Effect | Yes | |||
| Intercept | 3,264*** | 2,146*** | 1,720** | |
| (353) | (425) | (759) | ||
| R-Squared | 0.04 | 0.22 | 0.32 | |
| Adjusted R-squared | 0.02 | 0.20 | 0.26 | |
| F | 2.51* | 10.36*** | 5.45*** | |
| Observations | 188 | 188 | 188 | |
Note: *p<0.1; **p<0.05; ***p<0.01; Standard errors are in parentheses below coefficient estimates; DV: Dependent variable. DV is cumulative cases per 100,000 student population. R’ is the duration of vaccine requirement (unit: a semester; R’={0, 0.5, 1}).