
Frisch (1932) New Methods of Measuring Marginal Utility. Mohr, Tübingen. p. 2-3: Quoted in: Dagsvik, John K., Steinar Strøm, and Zhiyang Jia. " A stochastic model for the utility of income http://www.ssb.no/a/publikasjoner/pdf/DP/dp358.pdf." (2003).
1930s