Most recently in The Undercover Economist by Tim Harford.
I can't give a full recommendation because it's recent enough that I'm still only about halfway through it, but overall it has been worth a read so far. (I found some chapters dull -- in particular the bits about the 2008 financial crisis have just not interested me -- but I have high hopes it will regain my interest again in the rest of the chapters.)
Do you recall where? I'd be interested in reading it