Journal Article Two Trials to Determine Expectation Models Applicable to Agriculture Get access T. W. Schultz, T. W. Schultz Iowa State College Search for other works by this author on: Oxford Academic Google Scholar O. H. Brownlee O. H. Brownlee Iowa State College Search for other works by this author on: Oxford Academic Google Scholar The Quarterly Journal of Economics, Volume 56, Issue 3, May 1942, Pages 487–496, https://doi.org/10.2307/1882212 Published: 01 May 1942