Well, technically not nothing. Exercise can get you a few hundred extra calories burned a day, which will have an impact.
But the sentiment is correct. 90% of losing weight is eating less calories. Exercise is still good though, without it a lot of the lost weight is going to be muscle.
“Our estimates imply that nationally implementing mandatory face masks for employees in public businesses on March 14th would have reduced the growth rate of cases and that of deaths by approximately 10 percentage points in late April. [...] We estimate that business shutdowns have roughly the same impact on growth rates as mask mandates, albeit with more uncertainty.”
Whether a price is $59.99 or $60.00 conveys a notable degree of information to the consumer. I wouldn’t be quick to assume it’s taking advantage of people’s innumeracy.
Perhaps, but there is a small benefit to the consumer. A whole number can indicate the brand is positioned towards upper-class consumers and that a price conscious consumer should look for cheaper alternatives.
It’s not a significant benefit, restaurants are the best application I can think of, but the harm that occurs from it is similarity miniscule.
For example, damages for trucking accidents have grown substantially over the last decade. https://www.cnbc.com/2021/03/24/rise-in-nuclear-verdicts-in-...