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Journal Article Models of Technical Progress and the Golden Rule of Research Get access E. S. Phelps E. S. Phelps Yale University Search for other works by this author on: Oxford Academic Google Scholar The Review of Economic Studies, Volume 33, Issue 2, April 1966, Pages 133–145, https://doi.org/10.2307/2974437 Published: 01 April 1966
Edmund S. Phelps (1966) studied this question.