Replication Data for: Does Electing Extremist Parties Increase Violence and Intolerance?

We estimate the effect of incumbency by Islamist parties on the incidence of religious violence and intolerance in Indonesia, exploiting discontinuities in the proportional representation system used to allocate seats in district legislative elections---the most local tier of parliamentary government. We find that the presence of additional Islamist (as opposed to secular nationalist) legislators exacerbates religious conflict according to certain measures. There is no evidence that Islamist rule affects average attitudes toward religious minorities among majority-group survey respondents, although it does increase expressions of extreme intolerance. Social emboldening may underlie these effects, as Islamist incumbency appears to boost the perceived acceptability of holding intolerant worldviews. The results shed light on the consequences of having extremist parties gain a share in local power.