Lucas critique (1976)
Robert Lucas argued that econometric models based on historical relationships between variables would break down when policy changed, because households and firms adapt their expectations. The critique undermined the Keynesian consensus that had guided policy since the 1930s.
The critique triggered a crisis in macroeconomics, as researchers realized the old models could not reliably guide policy.
It set the agenda for rebuilding macroeconomics on microeconomic foundations, the project Hall and Woodford completed.
Hall and Woodford's work is the constructive response to Lucas's critique, building models where expectations are forward-looking and policy-relevant.
