Our researchers investigate the rich morphosyntax of Estonian and other Finno-Ugric languages, which enriches our knowledge of the structure of Estonian as well as the general theory of language by introducing patterns and behavior only visible in morphologically complex languages. We are interested in variation in derivational and inflectional morphology and syntactic phenomena like word order and argument structure. Various approaches are used in the Institute to investigate morphosyntactic phenomena, including usage-based and other functional approaches, frequently based on quantitative corpus studies, experiments or qualitative research.