Research and position papers of the Rappaport Center : = Meḥḳarim ṿe-neyarot ‘emdah shel Merkaz Rapaport le-Ḥeḳer ha-Hitbolelut u-le-Ḥizuḳ ha-Ḥiyuniyut ha-Yehudit - Rappaport Center for Assimilation, Research and Strengthening Jewish Vitality; Zohar, Tsevi