doi:10.17811/ebl.7.3.2018.92-97engGimenez-Nadal, José IgnacioThe substitution effect from the profit function in consumption: Expressions from the marshallian, hicksian, and frischian demand functionsART-2018-109610In the context of the optimizing behaviour assumption of individuals (Becker, 1976), three types of demand functions appear: Marshallian, Hicksian, and Frischian functions (Sproule, 2013). The Substitution Effect (SE) is a relevant concept, with our short paper developing two alternative theoretical expressions, specifically focusing on the Profit Function in Consumption and the Frischian functions. I address the fact that these demand functions with constant marginal utility of income play a very relevant role in the inter-temporal context.2018http://zaguan.unizar.es/record/7699710.17811/ebl.7.3.2018.92-97http://zaguan.unizar.es/record/76997oai:zaguan.unizar.es:76997Economics and business letters 7, 3 (2018), 92-97byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess