So, I found a very interesting dataset, the
Oxford Government Response Tracker. Basically, it tracks government action in response to the coronavirus. The stringency index is based on Eight of the policy indicators (C1-C8) record information on containment and closure policies, such as school closures and restrictions in movement (the variables are: school closing, workplace closing, canceling public events, restrictions on gatherings, public transport closings, stay at home requirements, restrictions on internal movements, and international travel controls). They show the relationship between the index and number of cases:
You can see that the United States' (and the UK's) response curve was "behind" the log of cases. South Korea's was consistently ahead (so, no surprise that they managed to contain the virus).
There is also this plot, which shows the response plotted against the number of cases:
You can see that the two laggards in terms of response are the UK and the US. Unfortunately, they didn't include Germany in the plots, but they do make the underlying data available for download:
https://github.com/OxCGRT/covid-policy-t...latest.csv
So here is the plot of confirmed deaths versus stringency index, with Germany included (I also added the date every time the stringency index went up):
The results show that in those crucial early days, when the cumulative number of deaths was still fairly low, Germany was way ahead of the game (for example, it had hit the 25% stringency index before they recorded their first death and hit 50% on March 18th, when they still had just over 10 deaths). The US on the other hand hit the 25% mark on March 12, when there were already 30 deaths. We did hit the 50% stringency index a couple days before Germany did, but by then we had 69 deaths, while Germany only had 12. Subsequent tightenings of social distancing requirements tended to occur a few days earlier in the US than Germany, but we consistenly had over a half log order more deaths when we instituted it.
Not surprisingly, the only country that did worse than the US was the UK, where early policy was to not implement social distancing (until about March 16). At that point, deaths were rising rapidly, and though the UK went into lockdown mode quickly over the ensuing week, deaths jumped 7-fold as well.
Here, Spain is marginally better than the US, but deaths were rising quickly between the 9th and 14th of March.
The one datapoint I don't fully understand is Italy. My guess is that this early in the pandemic, confirmed cases and deaths were undercounted (or somehow the stringency index is overestimating what was happening in Italy at the time. I'll have to dig a bit more at the data to see what was driving it, but if this is to be believed, Italy actually was pretty aggressive in responding and was just unlucky.
BC