The political determinants of judicial dissent: evidence from the Chilean Constitutional Tribunal

Many judicial scholars argue that judicial dissent stems from partisanship or political differences among judges on courts. These arguments are evaluated using the variation in political backgrounds on a constitutional court, Chile's Constitutional Tribunal, using case-level and vote-level data from 1990 until 2010. The analysis shows that the rate of dissent rises after major reforms to the powers and judicial selection mechanism of the Tribunal in 2005 and that the dissent rate corresponds to periods of greater partisanship on the court. Further, decisions regarding the unconstitutionality of laws intensify the propensity to dissent at both the case and judge level. In further examination of variation across judges' voting records, judges who have identifiable partisan associations of any kind are generally more likely to dissent than those with limited political backgrounds.