The defects of traditional Keynesianism and the achievements and mistakes of neoclassicism inspire some scholars to construct microcosmic-based macroeconomics and find another way to make empirical analysis of labor market and product market Based on the wage price rigidity and market clearing hypothesis, they take the neoclassical wage price activity flexibility and market clearing hypothesis and combine it with the re-Keynesian conclusion in the macro output and employment decision theory
in this way, new-Keynesianism came into being
New Keynesianism is to replace the neoclassical hypothesis with the hypothesis of wage, price rigidity and non market clearing