Study title

Data and codebook for the updated EPR-O data. It includes 86 countries covering the years from 1946 to 2019 or 2000 - 2019 for the additional countries. The original EPR-Organizations dataset (see Supplementary Material at https://doi.org/10.1177/0022002721996436 ) includes 40 countries covering the years from 1946 to 2013. We extend this data in two ways: 1. We expand the time coverage for previously coded countries for the years 2014 - 2019 2. We add new countries with a temporal coverage of the years from 2000 - 2019 For more information on the dataset consider the cited sources as well as the codebook. Please cite the following sources when using the dataset: Vogt, M., Gleditsch, K. S., & Cederman, L.-E. (2021). From Claims to Violence: Signaling, Outbidding, and Escalation in Ethnic Conflict. Journal of Conflict Resolution, 65(7-8), 1278-1307. https://doi.org/10.1177/0022002721996436 Gremler, F., Vogt, M. & Weidmann, N. B. (2024). Intra-Ethnic Divisions and Disagreement Over Self-Determination Demands in Ethnic Movements. Political Science Research and Methods (forthcoming).