多谢先！~
Productivity Growth, Technical Progress, and Efficiency Change in Industrialized Countries: Comment Subhash C. Ray and Evangelia Desli The American Economic Review, Vol. 87, No. 5 (Dec., 1997), pp. 1033-1039
(article consists of 7 pages) Published by: American Economic Association Stable URL: http://www.jstor.org/stable/2951340