geoEPR Nigeria dataset used as example for a SpatialPolygonsDataFrame available from https://icr.ethz.ch/data/epr/geoepr/. The dataset contains geo-locations for all politically relevant ethnic groups from the EPR-Core 2014 dataset. It assigns every politically relevant group one of six settlement patterns and provides polygons describing their location.
data(geomerge)A SpatialPolygonsDataFrame containing observations.
Andrew M. Linke, Karsten Donnay. (2017). "Scale Variability Misclassification: The Impact of Spatial Resolution on Effect Estimates in the Geographic Analysis of Foreign Aid and Conflict." Paper presented at the International Studies Association Annual Meeting, February 22-25 2017, Baltimore.