After World War II , Paul Samuelson used the term neoclassical synthesis to refer to the integration of Keynesian economics with neoclassical economics .
Over the years , a sequence of ' new ' macroeconomic theories related to or opposed to Keynesianism have been influential .
After World War II , Paul Samuelson used the term neoclassical synthesis to refer to the integration of Keynesianism economics with neoclassical economics .
Over the years , a sequence of ' new ' macroeconomic theories related to or opposed to Keynesianism have been influential .