“…Small donors simultaneously and non-cooperatively select which amount to contribute to their preferred candidate, with 10 Each small donor has a twodimensional type ¬ , where 2 f g identi…es who is his preferred candidate/party and represents 's income (which will in ‡uence his willingness to contribute.) There are donors of type , distributed in income classes 1 according to some (dis- 9 This is inspired by an increasingly large literature: see Tullock (1980), Hirshleifer (1989), Baron (1994), Skaperdas and Grofman (1995), Esteban and Ray (2001), Epstein and Nitzan (2006), Konrad (2007), Jia et al (2013), Herrera et al (2014Herrera et al ( , 2016, among others.…”