Russ Roberts interviewed Ed Leamer about outsourcing; Leamer classifies technologies into forklifts or microphones. Forklifts equalize workers, practically everyone can work in a warehouse now, hugeness is no longer required. Microphones exacerbate differences, the few elite dominate.

Leamer fears that more new technologies seem more like microphones than forklifts. Autor's recent work showing no recent growth in specialized occupations seems to confirm this.