I would guess that most MIT Ph. D.'s since 1980 might deem themselves not to be Keynesians. But they, and modern economists everywhere, do use models like those of Samuelson, Modigliani, Solow, and Tobin. Professor Martin Feldstein, my Harvard neighbor, complained at the 350th Anniversary of Harvard that Keynesians had tried to poison his sophomore mind against saving. Tobin and I on the same panel took this amiss, since both of us since 1955 had been favoring a neoclassical synthesis, in which full employment with an austere fiscal budget would add to capital formation in preparation for a coming demographic turnaround.
New millennium - An Interview with Paul A. Samuelson, 2003