We provide general results for the asymptotic variance of regression coefficients computedfrom a sample drawn from a finite population. We encompass the potentialoutcomes and classic regression frameworks allowing for both heterogeneous treatmenteffects and random-across-resampling shocks....

We carry out some analysis of the daily data on the number of new cases and number of new deaths by (191) countries as reported to the European CDC. We work with a quadratic time trend model applied to the log of new cases for each country. This seems to accurately describe the trajectory of the...