The hidden demographics of Roman migration - LUUK DE LIGT and LAURENS E. TACOMA (edd.), MIGRATION AND MOBILITY IN THE EARLY ROMAN EMPIRE (Studies in Global Social History vol. 23; Studies in Global Migration History vol. 7; Brill, Leiden 2016). Pp. xvii + 517, figs. 26, tables 17. ISSN 1874-6705; ISBN 978-90-04-30736-0