Key points are not available for this paper at this time.
Journal Article E. Mansfield. Industrial Research and Technological Innovation: An Econometric Analysis Get access Industrial Research and Technological Innovation: An Econometric Analysis. By E. Mansfield. (New York: W. W. Norton for the Cowles Foundation in Economics at Yale University, 1968. Pp. xviii + 235. 72s.) S. J. Prais S. J. Prais London. Search for other works by this author on: Oxford Academic Google Scholar The Economic Journal, Volume 78, Issue 311, 1 September 1968, Pages 676–679, https://doi.org/10.2307/2229396 Published: 01 September 1968
Prais et al. (Sun,) studied this question.