The U.S. isn't at the top of the list
With a new law barring work e-mail after hours, the French have honored a truth long recognized by economists: working longer hours doesn’t necessarily result in increased productivity. Mexico—the least productive of the 38 countries listed in 2015 data from the Organization for Economic Cooperation and Development (OECD)—has the world’s longest average work week at 41.2 hours (including full-time and part-time workers). At the other end of the spectrum, Luxembourg, the most productive country, has an average workweek of just 29 hours.