SchoolsMacroConceptsSchoolsPolicyModels
Macroeconomic school

New Classical

New Classical on recessions, inflation, policy, and the mechanism it treats as decisive.

Mainstream tradition

School thesis

New Classical macro is a discipline against policy stories that ignore expectations. It asks whether a proposed policy survives once agents understand the rule behind it.

New Classical starts from forward-looking agents and rational expectations sharply limit predictable policy effects.

Mechanism: expectations and policy credibility shape how households and firms respond before policy fully lands. Policy instinct: favor credible rules and structural policy design over ad hoc stabilization.

Use when

The binding channel is visible

Rational expectations as a discipline on macro models, microfoundations as a coherence requirement, time-consistency problems in policy, and equilibrium business cycles built from optimizing households and firms.

Evidence burden

Show timing and measurement

Inflation expectations adjust to credible regime shifts (Volcker disinflation, post-1992 inflation-targeting adoptions, post-1999 ECB) in ways consistent with forward-looking expectations.

Rival check

Name the stronger alternative

Persistent unexploited arbitrage opportunities in financial and product markets consistent with frictions the model rules out.

Mechanism chain

From claim to policy rule

Claim

Binding constraint

Forward-looking agents and rational expectations sharply limit predictable policy effects.

Mechanism

Transmission

Expectations and policy credibility shape how households and firms respond before policy fully lands.

Policy read

Policy implication

Favor credible rules and structural policy design over ad hoc stabilization.

Mechanism

Required conditions

The claim needs each step in the data; a missing link weakens the whole interpretation.

Expectation

Agents react before policy lands

Households and firms use available information, including expected policy, when setting prices, wages, saving, and investment.

Invariance

Reduced-form parameters can move

A relationship estimated under one policy regime may fail under another because behavior changes with the rule.

Rule

Credible regimes matter more than surprises

Policy is strongest when it changes incentives, credibility, and the rule of the game rather than exploiting old correlations.

Reads the economy through

rational expectations / credibility / microfoundations

Lineage

Lineage and inheritance

Historical moves show which problem the tradition was built to solve and which claim it keeps defending.

1972-1973

Lucas islands and output-inflation tradeoffs

Imperfect information and expectations explained why anticipated and unanticipated nominal disturbances differ.

1976

The Lucas critique

Policy evaluation must use structural behavior that remains meaningful under the policy being tested.

Afterward

DSGE discipline

Modern structural macro inherited the demand for explicit preferences, constraints, expectations, and policy rules.