I don't think any human endeavor has ever saved so many lives in such a short period of time. There have been huge personal costs to staying home and canceling events, but the data show that each day made a profound difference.

Solomon Hsiang

The guys that are at the top of the hill right now, places like the United States and China, they are going to start falling down the hill and performing poorly.

There is sort of an optimal temperature band where countries seem to do really well from an economic standpoint and there is on either side there are temperatures that are too cold and temperatures that are too hot.