Welfare Trends among the Yoruba in the Early Nineteenth Century: The Anthropometric Evidence
研究发现19世纪早期约鲁巴人比西非其他民族身高更高，这主要归因于其社会结构和城镇带来的优越营养状况；而在奥约帝国崩溃的40年间，约鲁巴人的身高出现绝对和相对下降。
Analysis indicates that the Yoruba were taller than other West African peoples in the early nineteenth century. Disease, workloads, and environmental or genetic factors explain little of this differential. Rather, it appears due to a superior nutritional status made possible by Yoruba social structures, in particular, Yoruba towns. Yoruba stature declined both absolutely and relatively over the forty years corresponding to the collapse of the Oyo Empire. Regression analysis suggests a systematic relationship between these two events.