U.S. first quarter productivity strongest since 2014, labour costs subdued

WASHINGTON (Reuters) - U.S. worker productivity increased at its fastest pace in more than four years in the first quarter, depressing labour costs and suggesting inflation could remain benign for a while.The report from the Labour Department on Thursday came on the heels of data this week showing moderate wage growth in the first quarter and a key inflation measure posting its smallest annual gain in 14 months in March.The Federal Reserve on Wednesday held interest rates steady and signalled..