[ur-whale]

Is this really a study where there is exactly one subject?

He can gather another million data point about a single subject (himself), that's never going to prove the point.

At the very best, he'll prove money makes him happy. And probably not even that, given how many factors might affect his own life and moods.

[audleman]

I too find it strange that he couches this as a scientific study. A study of....himself.

Aside from starting an anecdotal conversation about happiness and money, there is no scientific merit here.