Ph.D. 1919; 1921/1928 an der Columbia Univ. (anfangs Lecturer in Roman Law and Comparative Jurisprudence, dann Assistant Prof. of Roman Law ..., später Associate Prof. und 1928- Prof.); 1928/33 Prof. of Law, The Inst. of Law, John Hopkins; ab 1933/34 Visiting Prof. of Law, Univ. of Michigan und dann 1934- Prof. of Law, Univ. of Michigan (Stand des Nachweises vgl. Biogr. Enc. of the world, 3.ed, 1946!); Editor: Michigan legal studies 1939-; Ed.-in-Chief of American Journal of Comparative Law