U.S. worker productivity grew at its fastest pace in two years in the ​third quarter as businesses invested heavily in artificial ‌intelligence, depressing labor costs. Nonfarm productivity, which measures hourly output per worker, accelerated ‌at a 4.9% annualized rate, the Labor Department’s Bureau of Labor Statistics. That was the quickest pace since the third quarter of 2023 and followed an upwardly revised ⁠4.1% growth rate in ‌the second quarter. US third-quarter productivity rises at fastest pace in two years