EU vs US labor and productivity data

Taken from WSJ. French and German workers are as productive, on a per hour basis, as US workers, although US workers tend to work more hours per year, which leads to greater GDP per worker per year. Two effects worth noting: (1) workers who work fewer hours should be more productive per hour, as one's effectiveness tends to degrade over a long workday (2) excluding less productive workers (i.e. having a higher unemployment rate, as Germany and France do at 9-10% vs 5% here) should lead to higher average productivity.