African polygamy over space
I map African polygamy in Figure 1. Each point is a married woman for whom the DHS data gives geographic coordinates. Red dots are polygamists, while blue dots are monogamists. Polygamy is most concentrated in West Africa, though it really is in no way limited there. Polygamy in the info is basically bigamy – 72% of respondents report they are the only wife, 19% report that their husband has two wives, 7% report that he has three wives, and less than 2% report that he has 4 wives or even more.