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Journal Article The League of Nations Professor Tinbergen's Method Get access J. M. Keynes J. M. Keynes Search for other works by this author on: Oxford Academic Google Scholar The Economic Journal, Volume 49, Issue 195, 1 September 1939, Pages 558–577, https://doi.org/10.1093/ej/49.195.558 Published: 01 September 1939
John Maynard Keynes (Fri,) studied this question.