Time to go home already!
Let the Federal Reserve Bank of Minneapolis explain why "Americans now work 50 percent more than do the Germans, French, and Italians. This was not the case in the early 1970s, when the Western Europeans worked more than Americans."
Most of the Federal Reserve Banks have research sections that produce reports of interest like this one. For a list of FRB web sites, please see http://www.federalreserve.gov/otherfrb.htm.