 and Radvision in 1992, which was founded by Ami Amir and Eli Doron and received external funding from Evergreen and Clal venture capital funds, as well as from Siemens.According to research conducted by Prof. Shmuel Ellis, Chair of the Management Department at Tel Aviv University's Faculty of Management, together with Prof. Israel Drori of the School of Business Administration at the College of Management Academic Studies and Prof. Zur Shapira, Chair of the Management and Organizations Department at New York University, the RAD Group has been "the most fertile ground" for creating Israeli entrepreneurs, having produced 56 "serial entrepreneurs" who established more than one start-up each.RAD Group "graduates" were responsible for the establishment of a total of 111 significant hi-tech initiatives.