What is the fine-grained topic of the following text: Within the overall group of 1,592 institutions, Earlham ranks 12th in the Life Sciences, 46th in Social Sciences, 51st in Business, and 58th in Humanities in the percentage of graduates who go on to receive Ph.D.s. Only return the topic.
Earlham's ranking in producing graduates who go on to receive Ph.D.s