Ariela Keysar is a Research Fellow at the North American Jewish Data Bank at the Graduate Center of the City University of New York. Jeffrey Scheckner is the administrator of this institution and is also Research Consultant for United Jewish Communities (formerly the Council of Jewish Federations.) Barry Kosmin is Director of the Institute for Jewish Policy Research in London, England. Formerly he was Director of Research at the Council of Jewish Federations and Director of the North American Jewish Data Bank.