10.3 Effectiveness of policy options to meet all macroeconomic objectives

A policy is effective when it changes the targeted outcome by more than its costs and side effects. Transmission lags, expectations, leakages, implementation quality and the binding constraint determine the result.

Fiscal multipliers may be smaller when imports and saving are high; monetary policy may be weak when banks or borrowers are constrained; supply reforms may take years. Evaluate the counterfactual rather than the announcement.

A rate cut may have little effect in a credit crunch, while targeted public investment can be stronger if idle labour and infrastructure bottlenecks are the main constraints.

A policy instrument’s textbook direction is not proof of a large real-world effect, and “more” policy is not always better.

Policy conflicts arise when improving one objective worsens another—for example, demand stimulus can reduce unemployment but increase inflation, imports or debt.

Conflicts depend on the output gap, exchange-rate regime, supply response, distribution and time horizon. A policy can also have different effects on households, firms, regions and generations.

A tax rise may reduce inflationary demand but lower disposable income and employment; training may improve long-run supply while imposing short-run fiscal cost.

There is no universal list of “good” and “bad” policies: state the objective, mechanism, timing and affected group before judging the trade-off.

Macroeconomic government failure occurs when policy produces a worse outcome than the feasible alternative because of poor information, delays, unintended incentives, capture, political short-termism or implementation limits.

Policy makers cannot observe potential output, the multiplier or the natural rate perfectly. A well-intentioned policy can arrive after conditions change, amplify a cycle or shift costs to another objective or group.

Stimulus designed for a recession that has already ended may create excess demand and inflation; an austerity package based on an overestimated multiplier may depress output more than expected.

Government failure does not imply no role for policy; compare the actual policy with the market outcome and with the best feasible alternative, not with perfection.