Commenter Nylund notices that economists are a particularly long-lived species:

Is it just me or do famous economists seem to live a really long time?Friedman (94).Mises (92)John Kenneth Galbraith (98)Hayek (92)Leontief (93)Except poor Keynes. I think the main reason Keynesian economics took a backburner was because so many his opponents simply outlived him.But, besides Keynes (or any of the really old school guys like Ricardo and Say), its rare to fine a major economist that didn’t make it well into their 80’s.

Paul Samuelson, as I found out today, is in his 90s. Ken Arrow is 87. It’s impressive. These guys have managed to maximize their utility by prolonging their capacity to experience it.

Ezra Klein is a former Prospect writer and current editor-in-chief at Vox. His work has appeared in the LA Times, The Guardian, The Washington Monthly, The New Republic, Slate, and The Columbia Journalism Review. He’s been a commentator on MSNBC, CNN, NPR, and more.