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Journal Article Freedom of Entry and the Existence of Pure Profit B. Curtis Eaton, B. Curtis Eaton University of British Columbia Search for other works by this author on: Oxford Academic Google Scholar Richard G. Lipsey Richard G. Lipsey University of British Columbia Search for other works by this author on: Oxford Academic Google Scholar The Economic Journal, Volume 88, Issue 351, 1 September 1978, Pages 455–469, https://doi.org/10.2307/2232046 Published: 01 September 1978
Eaton et al. (Fri,) studied this question.
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