Key points are not available for this paper at this time.
Bart van Ark, Dirk Pilat, Dale Jorgenson, Frank R. Lichtenberg, Productivity Levels in Germany, Japan, and the United States: Differences and Causes, Brookings Papers on Economic Activity. Microeconomics, Vol. 1993, No. 2 (1993), pp. 1-69
Ark et al. (Fri,) studied this question.