“…These include, apart from demographic or economic characteristics, the weather Gomez 2010, Gomez et al 2007), general rules of governance (Hinnerich andPettersson Lidbom 2014, Herrera, Morelli andPalfrey 2014), voting systems (Braconnuer, Dormagen andPons 2014), candidates' ethnicity (Washington 2006), and availability of certain information technology (Stromberg 2004, Enikolopov, Petrova and Zhuravskaya 2010, Gentzkow, Shapiro and Sinkinson 2011, Gentzkow 2006and Gavazza, Nardotto and Valletti 2014. Like infections incidence, these factors may impact public policy, through their effect on variables other than voting cost or through their impact on the political affiliation of elected representatives -that is, directly or indirectly.…”