10.7910/DVN/SLWCLZ Cederman, Lars-Erik Lars-Erik Cederman ETH Zürich Rüegger, Seraina Seraina Rüegger ETH Zürich Schvitz, Guy Guy Schvitz https://orcid.org/0000-0002-5036-4123 ETH Zürich Harvard Dataverse 2021 Social Sciences Civil conflict Geographic border change Irredentism Schvitz, Guy Guy Schvitz Cederman, Lars-Erik Lars-Erik Cederman ETH Zürich Rüegger, Seraina Seraina Rüegger ETH Zürich Schvitz, Guy Guy Schvitz ETH Zürich 2020-09-18 2021-04-19 2022-04-27 10.1111/AJPS.12634 5896 3871932 42961125 53569955 22883882 2442449 1351605 72234796 24614 4152222 2710441 37111974 3572 51950271 103565 346929 1444223 85577 1574 2773887 7021677 11931057 156 99143 6294 1032 9411 5638 6374 24188 185322 14609 1082 7557 text/tab-separated-values application/octet-stream image/tiff text/x-fixed-field text/tab-separated-values application/octet-stream text/tab-separated-values text/tab-separated-values application/octet-stream text/tab-separated-values text/tab-separated-values application/octet-stream type/x-r-syntax application/octet-stream application/pdf application/pdf application/pdf application/pdf application/x-stata-syntax text/tab-separated-values text/tab-separated-values text/tab-separated-values application/x-stata-syntax text/tab-separated-values type/x-r-syntax type/x-r-syntax application/x-stata-syntax type/x-r-syntax application/x-stata-syntax type/x-r-syntax application/pdf application/x-stata-syntax type/x-r-syntax text/plain 1.1 Custom terms specific to this dataset Are past border changes responsible for today’s civil wars? Departing from conventional, state-centric research designs, this paper examines this question by focusing on “aggregate” ethnic groups, which are defined independently of state borders. Introducing a new index of “territorial fractionalization” that measures how fragmented such groups are across states, we postulate that higher fragmentation is linked to a greater risk of civil conflict. Furthermore, we expect that groups that experienced increases in fragmentation are particularly violence prone, as illustrated by post-imperial revisionism and other cases of irredentism and secession. To test our arguments, we combine geocoded data on ethnic settlement areas with our own newly collected data on international borders since 1886, complemented by mediation analysis based on ethno-nationalist claims. Covering ethnic groups around the world since 1946 through 2017, our findings are robust to the inclusion of control variables, fixed effects and the use of alternative historical ethnicity datasets. This dataset underwent an independent verification process that replicated the tables and figures in the primary article. For the supplementary materials, verification was performed solely for the successful execution of code. The verification process was carried out by the Odum Institute for Research in Social Science at the University of North Carolina at Chapel Hill. <br></br> The associated article has been awarded Open Materials and Open Data Badges. Learn more about the Open Practice Badges from the <a href="https://osf.io/tvyxz/wiki/home/" target="_blank">Center for Open Science</a>.<br></br> <img src="https://odum.unc.edu/files/2020/03/OpenData_PR-1.png" alt="Open Data Badge" height="77" width="80"> <img src="https://odum.unc.edu/files/2020/03/OpenMaterials_PR-1.png" alt="Open Materials Badge" height="77" width="80">