Department of Computer & Information Science Brooklyn College, City University of New York, 2900 Bedford Avenue, Brooklyn, NY;Department of Computer & Information Science Brooklyn College, LAMSADE, Université Paris-Dauphine, 2900 Bedford Avenue, Brooklyn, Paris Cedex 16, France;Department of Mathematics and Computer Science, Paris Descartes University, 45, rue des Saints-Pères, Paris Cedex 06, France;Faculty of Informatics, British University in Dubai, 45, rue des Saints-Pères, Dubau, United Arab Emirates