“…A variety of theoretical ideas have been put forward. In particular, John Carey, Matthew Shugart, and others argue that politicians elected under 'candidate-centric' electoral rules, such as an open-list PR system, are more likely to be independent from their parties than politicians who are elected under 'party-centric' rules, such as closed-list PR system (Carey and Shugart, 1995;Samuels, 1999;Shugart, 2005;Mitchell, 2000;Shugart et al, electoral systems, political career paths and legislative behavior 155 2005; Carey, 2007Carey, , 2008. When testing these propositions in cross-country research, a common problem is that it is difficult to identify the causal effect of electoral rules on legislative behavior independently from several other cross-country factors, such as how parties are organized.…”