1. The Disney MagicBand, or why there is no such thing as anymore as a "tech company."
2. David Autor, David Dorn and Gordon Hanson -- the experts on the effects of trade with Asia on U.S. employment -- weigh in on the Trans-Pacific Partnership. They are a yes. Tyler Cowen: Yes. Paul Krugman: No. Ezra Klein: Maybe. Larry Summers: Probably.
3. Via Mike Konczal, the historian Eric Foner is teaching an online course on Reconstruction for EdX, the third in a sequence.
4. Ever not remember what the LaTeX code is for some math symbol? Do you remember what the symbol looks like? Detexify lets you draw it. This tool has saved me so many times. Very useful for academics.