His primary research interests lie in syntax and its interfaces with morphology and semantics. His dissertation work at New York University was published in Springer’s Studies in Natural Language and Linguistic Theory series as Icelandic Morphosyntax and Argument Structure (2015). Since 2012, he has been a leading member of the Yale Grammatical Diversity Project and is a co–principal investigator on the National Science Foundation grant funding its work. His research has been published in Natural Language & Linguistic Theory, Linguistic Inquiry, Syntax, American Speech, and elsewhere.