For the last couple of years, U.S. labor productivity has been on the rise. And economists don't know exactly why. So today on the show, the president of the Federal Reserve Bank of Chicago plays economic detective and helps us investigate some different theories about why U.S. workers seem to be more productive than in prior decades. Related episodes: What keeps a Fed president up at night (Apple / Spotify) Productivity and workforce whiplash (Apple / Spotify) For sponsor-free episodes of The Indicator from Planet Money, subscribe to Planet Money+ via Apple Podcasts or at plus.npr.org. Fact-checking by Sierra Juarez. Music by Drop Electric. Find us: TikTok, Instagram, Facebook, Newsletter. Learn more about sponsor message choices: podcastchoices.com/adchoices NPR Privacy Policy