"Those who say they are Jews and are not" : How do you know a Jew in antiquity when you see one? / Shaye J.D. Cohen. -- The unromanized in Rome / Ramsay MacMullen. -- How to be a Greek and yet a Jew in Hellenistic Alexandria / Joseph Mélèze-Modrzejewski. -- The birth of diaspora: the emergence of a Jewish self-definition in Ptolemaic Egypt in the light of onomastics / Sylvie Honigman.