Authors: Santana, A; Montero, JR; Rama, J Article. J. Politics Lat. Am.. vol: 12. page: 1866-802X. Date: APR. 2020. Doi: 10.1177/1866802X20913886. Abstract: This article puts Down’s instrumental voter model (IVM) to a formal test using data of the 2017 Chilean national elections. It aims at two novel exercises in the research in the calculus of voting. Using a brand-new questionnaire with indicators on instrumental and consumption motivations for voting, we reassess the voting equation in Santiago de Chile. Furthermore, we analyse whether instrumental and consumption motivations have distinctive effects for individuals with different socio-demographic characteristics. Our results show that they do: women, younger, lower educated, and unmarried citizens are more responsive to both instrumental and consumption motivations. Moreover, the factors of the IVM travel better to Santiago de Chile than those of the consumption model..