The Ten Thousand Hour Rule Is So Popular That People Are Making Big Decisions Based on It

The ten thousand hour rule is so popular that people are making a lot of major life decisions based on it. We want to see big effects, but were we're really good at understanding the small effects, right? And we live in the small effect, right? Varian explained that statistically looking at the size of the effect and then you're able to make an estimate of how much of differences in performance across people is actually accounted for by practice.