Up to date version of this dataset can be found at http://www.icr.ethz.ch/data/epr/#geoepr
UCLA: Andreas Wimmer
The EPR v.1.1 dataset is available in a fully geo-coded version as well. GeoEPR version 1.0 provides the regional bases and settlement patters of the ethnic groups included in the Ethnic Power Relations dataset. The data is provided in GIS (geographic information system) shapefile format.
The GeoEPR project is a collaborative effort between researchers at the ETH Zurich and the University of California Los Angeles.
Project home page: http://dvn.iq.harvard.edu/dvn/dv/epr
The GeoEPR dataset is available in group-geoperiod format and can be downloaded at Harvard Dataverse together with information on coding rules.
Wucherpfennig, J., N. Metternich, L.-E. Cederman, and K. S. Gleditsch (2012). Ethnicity, the state and the duration of civil war. World Politics 64 (1), pp. 79-115.