
Borealis
The Global Strategy Lab
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2023-03-16
The primary interrupted-series analyses evaluated all targeted and total border closures by country-level intervention points. As robustness checks, Dickey-Fuller tests were run for every time series, with none exceeding the 5% critical value of the t-distribution for a unit root. Cumby-Huizinga general tests were run to correct results for each lag found to have serial autocorrelation present for all global and country interrupted time-series.