Journal Article Production Functions in which the Elasticities of Substitution stand in Fixed Proportions to each other Get access W. M. Gorman W. M. Gorman Nuffield College, Oxford Search for other works by this author on: Oxford Academic Google Scholar The Review of Economic Studies, Volume 32, Issue 3, July 1965, Pages 217–224, https://doi.org/10.2307/2295825 Published: 01 July 1965