This study presents binary comparisons of real output and labour productivity in manufacturing in Japan, South Korea and the U.S.A. in 1975, made according to an “industry of origin approach.” The 1975 benchmark comparisons have been updated to 1985. Value added per hour worked in Japanese manufacturing increased from 54 percent of the U.S. level in 1975 to 76 percent in 1985. In certain important branches such as electrical machinery, metal products and machinery and transport equipment, productivity leadership shifted to Japan. In South Korea, labour productivity in manufacturing increased rapidly from 1975 to 1985, both in absolute terms and relative to the U.S.A. Nevertheless, in 1985 value added per hour worked was only 14 percent of the U.S. le