 He was divorced and the father of two children.Cass was a Guggenheim Fellow in 1970, was an elected fellow of the Econometric Society since 1972, received an honorary doctorate from the University of Geneva in 1994, was a distinguished fellow of the American Economic Association in 1999 and was an elected fellow of the American Academy of Arts and Sciences since 2003.Cass made important contributions to pure economic theory, mostly in the field of general equilibrium theory.