Journal Article Off-Farm Work: A Marginal Analysis Get access Paul Polzin, Paul Polzin University of Montana Search for other works by this author on: Oxford Academic Google Scholar Peter MacDonald Peter MacDonald University of Montana Search for other works by this author on: Oxford Academic Google Scholar The Quarterly Journal of Economics, Volume 85, Issue 3, August 1971, Pages 540–545, https://doi.org/10.2307/1885941 Published: 01 August 1971