  Recently, Phillippe Lemoine posted a critique of our paper "Causal Impact of
Masks, Policies, Behavior on Early Covid-19 Pandemic in the U.S."
[arXiv:2005.14168] at his post titled "Lockdowns, econometrics and the art of
putting lipstick on a pig." Although Lemoine's critique appears ideologically
driven and overly emotional, some of his points are worth addressing. In
particular, the sensitivity of our estimation results for (i) including "masks
in public spaces" and (ii) updating the data seems important critiques and,
therefore, we decided to analyze the updated data ourselves. This note
summarizes our findings from re-examining the updated data and responds to
Phillippe Lemoine's critique on these two important points. We also briefly
discuss other points Lemoine raised in his post. After analyzing the updated
data, we find evidence that reinforces the conclusions reached in the original
study.
