A Model of the Natural Rate of Unemployment

Since the publication of Edmund Phelps' volume, the “new” macroeconomics has treated the labor market as a dynamic process of rational search by unemployed workers for available vacancies. Wages are viewed as at least potentially flexible, though free contracting between workers and firms may lead to fixed wages in the short run. Imperfect information is a crucial element of the theory, for it implies both a need for contracting and a need for rational search rather than simple market clearing in each period.