I asked the author: The survey was conducted using mechanical turk for American workers with full-time jobs. We didn't control for age, as you can see in the a

I asked the author: The survey was conducted using mechanical turk for American workers with full-time jobs. We didn't control for age, as you can see in the age breakdown of "are you more productive working from home," so had some age groups more represented than others. The margin of error is 4%. So that raises some red flags, because turkers are WAY more likely to be favorable towards WFH conditions. They already do that!