The 'Undercover Economist' Is a Bit Fuzzy on the Definition of Price Discrimination

(Note: Many thanks to my friend and expert in industrial organization, John Lunn, for his input in the post below.)

Remember, I like Tim Harford's work at the Financial Times. I really do. That's why it didn't feel good when I critiqued his caricature on NPR of how economists think about economic decision-making earlier this week.

But looking for something totally different the other day on YouTube, I stumbled on this video of Mr. Harford giving a lecture on price discrimination at the Devel...