Keywords from the paper
Mike and his coauthors used a large database of human demographic information, Utah Population Database (UPDB), to study the efffects of sexual selection and mating system. Read all about it in Evolution and Human Behavior :
Moorad JA, Promislow DEL, Smith KR, Wade MJ (2011) Mating system change reduces the strength of sexual selection in an American frontier population of the 19th century. Evolution and Human Behavior 32: 147-155.