The ACD2EPR 2021 dataset links ACD 20.1 conflicts to EPR-Core 2021 groups. For a more detailed description of the dataset, please see Wucherpfennig, Metternich, Cederman and Gleditsch (2012) below.


The ACD2EPR 2021 Docking data is used as a source for the GROWup data project, which offers research-ready country-year and group-year data via the Research Front-End data portal.

You may also download the latest version (2021, released on June 8, 2021) of the ACD2EPR docking dataset directly:


When using this dataset in your research, please include the following reference:

Vogt, Manuel, Nils-Christian Bormann, Seraina Rüegger, Lars-Erik Cederman, Philipp Hunziker, and Luc Girardin. 2015. “Integrating Data on Ethnicity, Geography, and Conflict: The Ethnic Power Relations Data Set Family.” Journal of Conflict Resolution 59(7): 1327–42.

When referring to the original ACD2EPR dataset please cite:

Wucherpfennig, Julian, Nils W. Metternich, Lars-Erik Cederman, and Kristian Skrede Gleditsch. 2012. “Ethnicity, the State, and the Duration of Civil War.” World Politics 64(1): 79–115.

Previous version

ACD2EPR 2019
ACD2EPR 2018
ACD2EPR 2014
ACD2EPR Docking Version 1.2
The ACD2EPR Docking Version 1.2 dataset links ACD v.4-2010 conflicts to EPR v.2.0 groups.