This article is a survey of quantitative research on the choice between thes-genitive and theof-genitive in English. It provides a detailed and critical review of the methodological problems and advances as well as major findings and how these have been treated in theoretical frameworks. The article concludes with a discussion of objectives and challenges for future research. It is argued that research into English genitive variation not only enhances our knowledge of this specific case of syntactic variation but also helps us to further understand the mechanisms of syntactic alternations in general.