# New Keynesian Economics **The model:** New Keynesian economics reconciles [[Keynesian Economics]] insight that demand shortfalls cause real unemployment with the New Classical demand for rigorous microfoundations. Its key move: accept rational expectations and optimizing agents, but add *realistic frictions* — chiefly **sticky prices and wages** — that prevent markets from clearing instantly. Once prices are sticky, a fall in demand produces real unemployment rather than instant re-equilibration, and stabilization policy has genuine work to do. It is Keynesian conclusions rebuilt on the New Classical's own rigorous foundations. ## Core mechanisms The friction that does the work is nominal rigidity: firms don't costlessly reset prices (menu costs, long-term contracts, the fear of moving before rivals), so when demand drops, output and employment fall instead of prices. This restores a role for monetary policy — a central bank cutting rates can boost real demand because prices don't instantly offset it — and provides the theoretical basis for modern inflation-targeting central banking (the workhorse New Keynesian DSGE models are what the [[Federal Reserve]] literally runs). New Keynesians accept the rational expectations framework and the [[New Classical Economics]], which is what separates them from old Keynesians, but they draw activist conclusions from imperfect competition, information asymmetries (Stiglitz), and coordination failures. The debate with the freshwater school is thus not about method but about which frictions matter and how much. ## Right-wing relevance New Keynesianism is the *mainstream consensus* that the American right's economic factions define themselves against from opposite directions. The New Classical/supply-side right attacks it as a rationalization for endless government activism and debt; the populist right attacks "the experts" and "the Fed" it embodies. Its policy fingerprints are on every major intervention the vault tracks — the 2008 bailouts and stimulus, pandemic-era fiscal support, and the 2022–24 rate hikes to fight inflation were all New Keynesian in logic. When "the economists" or "the establishment" are invoked as a foil in the vault's populist-economics material, this is usually the establishment being invoked. Its association with figures like Janet Yellen and Ben Bernanke also makes it a personified target. ## Critiques and successors From the right, New Classical and [[Austrian School]] critics argue it overstates market failures and understates the harm of intervention. From the left, [[MMT]] and post-Keynesians argue it wrongly conceded the rational-expectations framework and remains too deferential to central-bank orthodoxy and fiscal caution. The 2010s secular-stagnation debate and the post-2008 revival of fiscal policy both happened largely within an evolving New Keynesian frame. ## See also - [[New Classical Economics]] — the freshwater rival it debates - [[Keynesian Economics]] — the tradition it modernized - [[Monetarism]] — the earlier framework central banking absorbed - [[MMT]] — the heterodox challenge from the left - [[Behavioral Economics]] — a related turn toward realistic agents