It is by now obvious that there are some quite large differences in how much of an impact COVID-19 is having. As usual with social science, the evidence is a bit of a mess and there's no good randomized controlled trials. With that caveat, here's some factors that probably contribute to the variation.
Between country variation in COVID-19 impact
Between country variation in COVID-19 impact
Between country variation in COVID-19 impact
It is by now obvious that there are some quite large differences in how much of an impact COVID-19 is having. As usual with social science, the evidence is a bit of a mess and there's no good randomized controlled trials. With that caveat, here's some factors that probably contribute to the variation.