Peter Arkadiev has studied general linguistics (specializing in linguistic typology) at the Institute of Linguistics of the Russian State University for the Humanities, having graduated cum laude in 2004. In 2006 he has received his PhD degree in linguistic typology- the title of his thesis was “Typology of two-term case systems” (in Russian- advisors Prof. Dr. Vladimir Plungian and Prof. Dr. Tatjana Nikolaeva). From 2005 on he is a member of the department of Typology and comparative linguistics of the Institute of Slavic Studies of the Russian academy of sciences, and from 2008 on he is a lecturer at the Center of Linguistic typology of the Institute of Linguistics of the Russian State University for the Humanities. Courses he has taught include “Lithuanian in typological perspective”, “Case and case systems in the world’s languages”, “Typology of tense and aspect”, “Typology of alignment”, “Introduction to morphology”. His main research interests are Baltic languages, esp. Lithuanian, North-West Caucasian languages, esp. Adyghe, typology of case-marking, case systems and alignment. He has published more than 60 papers and reviews in Russian and international journals and edited volumes and has presented at numerous international conferences. Peter Arkadiev is a member of the Association for Linguistic Typology and of the Societas Linguistica Europaea. He is on the editorial boards of the international peer-reviewed journal “Baltic Linguistics” and of the Moscow-based international almanac “Balto-Slavic Studies”.