SchoolsMacroConceptsSchoolsPolicyModels
Macroeconomic school

Real Business Cycle

Real Business Cycle on recessions, inflation, policy, and the mechanism it treats as decisive.

Related lineage

School thesis

Real Business Cycle theory asks how much of the cycle can be explained without nominal failure. Its hard claim is that technology, preferences, and real constraints can generate business-cycle comovement.

Real Business Cycle starts from real shocks, especially productivity shocks, can generate business-cycle fluctuations.

Mechanism: households and firms optimally adjust labor, consumption, and investment in response to real disturbances. Policy instinct: stabilization is limited; understand the real source of the shock first.

Use when

The binding channel is visible

Productivity (TFP) shocks as the main driver of cyclical fluctuations, optimal intertemporal substitution by households and firms, money roughly neutral at business-cycle horizons, and no welfare-improving role for stabilization policy.

Evidence burden

Show timing and measurement

Solow-residual TFP series and output co-move at business-cycle frequencies, especially in the postwar US sample.

Rival check

Name the stronger alternative

TFP innovations and output diverging sharply, especially during recessions clearly tied to financial-sector or demand-side shocks.

Mechanism chain

From claim to policy rule

Claim

Binding constraint

Real shocks, especially productivity shocks, can generate business-cycle fluctuations.

Mechanism

Transmission

Households and firms optimally adjust labor, consumption, and investment in response to real disturbances.

Policy read

Policy implication

Stabilization is limited; understand the real source of the shock first.

Mechanism

Required conditions

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

Shock

Start with real disturbances

Productivity, tax, regulation, energy, and technology shocks change feasible production and intertemporal choices.

Choice

Households and firms reallocate

Labor, consumption, and investment respond to changed returns. The movement can be efficient even if it looks like a recession.

Calibration

Match second moments

The tradition judges models by whether they reproduce business-cycle volatility and comovement with plausible parameters.

Reads the economy through

productivity / intertemporal choice / supply-side shocks

Lineage

Lineage and inheritance

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

1982

Kydland and Prescott

The time-to-build model connected growth theory and business-cycle accounting inside one dynamic equilibrium framework.

1980s

Calibration

RBC work made calibrated structural simulation a standard way to ask quantitative macro questions.

Legacy

DSGE architecture

Even critics inherited its insistence on dynamics, expectations, constraints, and quantitative discipline.