In the (1955) edition of his top-selling Economics text, Paul Samuelson claimed economists had finally determined how economies worked. As he put it: In recent years 90 percent of American economists have stopped being Keynesian economists or anti-Keynesian economists. Instead they have worked towards a synthesis of whatever is valuable in older economics and in modern theories of income determination. The result might be called neo-classical synthesis and is accepted in its broad outlines by all but about 5 percent of extreme left wing and right wing writers.
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