Figure 1.

(a) Mean frequency of married women who are married polygynously by production system (±2 s.e.) using the Standard Cross-Cultural Sample [30]. Rates of polygyny are measured with variable ♯872, per cent of wives with co-wives. (b) Rates of monogamy and polygyny by production system are measured with variable ♯861, the standard polygamy code. Data on subsistence come from variable ♯858, categorized subsistence. In general, agricultural populations show reduced rates of polygyny and increased rates of monogamy relative to other subsistence systems. See electronic supplementary material for more information. (c) Gini of wealth by production system in our sample.