Inspired by research linking happiness and productivity, the Japanese multinational conglomerate Hitachi Ltd, invested in developing “people analytics” technologies like high-tech badges (so-called “happiness sensors”) to help companies monitor and increase employee happiness. Harvard Business School professor Ethan Bernstein discusses his case entitled “Sensing (and Monetizing) Happiness at Hitachi” — how to find the right business model — as well as the ethics of collecting and sharing employee happiness data and whether a happier workplace is truly a more productive one.