His research seeks to better understand the social factors and typological tendencies affecting language change; and the social, economic and community factors that affect language shift, particularly in heritage communities. A primary focus of Dr. Bousquette’s research program is the study of complementizer agreement. This common, largely non-standard phenomenon offers insight into processes of language change, both as an example of typological language change, as well as an example of the complexification of contact varieties. A second, predominantly collaborative branch of his research concerns itself with German and West Frisian heritage language communities in the United States, studying both the linguistic aspects of bilingualism, and the social factors affecting language shift to English monolingualism.