Set 9: Policy and Policymakers
Overview of Policymaking in Economics
The lectures focus on understanding the role of expectations in macroeconomic policy and processes, emphasizing the credibility of policymakers' decisions.
Goals of the Lecture Series’
Main Objective: Understand the role of expectations in macroeconomic policy.
Sub-goals:
Importance of credibility for policymakers.
Example of disinflation: The impact of different expectations (adaptive vs rational) on inflation and economic policy.
Explore concepts such as rational expectations, time inconsistency, and political business cycles.
Should Policy Makers Be Restrained?
Effective fiscal and monetary policies can support the economy but are often met with calls for restraint.
There's a focus on the necessity of self-restraint among policymakers due to uncertainties in macroeconomic policy impacts.
Uncertainty in Policy Effects
Various models predict output increases following a monetary expansion, but there is significant uncertainty regarding the extent and duration of these effects.
Policymakers should aim to prevent severe recessions and control inflation without over-tuning policies.
Restraints on Policymakers
The discussion transitions from self-restraint to discussing imposed restraints on policymakers, focusing on the interaction between policy and expectations.
Key Concepts:
Optimal control vs. strategic interactions.
The concept of hostage-taking and negotiations in policymaking dynamics.
Expectations, Credibility, and Disinflation
Example of disinflation illustrated:
High inflation ($Ft = F^et = FH$) vs. targeted lower inflation ($FL < F_H$).
The importance of expectations: If the central bank's promises are credible, disinflation can be achieved more easily.
Adjustments in Expectations
Simulation Steps for Disinflation Adjustment:
Initial Condition (Point A): Economy at full employment with high inflation.
Central Bank's Promise: To lower inflation while increasing interest rates, leading the economy along the Phillips curve.
Expectation Adjustments: Adjustments in expectations shift the Phillips curve, leading to a gradual movement toward the target inflation rate.
The Sacrifice Ratio
The sacrifice ratio measures the loss in GDP required to reduce inflation by 1 percentage point, typically estimated between 3 and 5.
Example Calculation: To lower inflation from 6% to 2% with a sacrifice ratio of 3 requires a total GDP loss of 12%.
Expectations Formation
Adaptive Expectations:
Formed based on past inflation: $ F^et = F{t-1}$.
Leads to inflation inertia: Past inflation influences current expectations.
Rational Expectations:
Formed from all available information.
The Phillips curve is expressed as: $ Ft = F^et - eta (ut - un)$, where expectations are based on forecasts of future policies.
Costless Disinflation:
When the central bank's announcement is credible, inflation expectations fall immediately, allowing for reduction without an increase in unemployment.
If not credible, higher unemployment and negative output gaps ensue as the economy adjusts poorly.
Time Inconsistency in Policy
Policymakers may face incentives to stray from initial promises, especially when attempting to balance inflation and unemployment.
Illustration: If a central bank promises low inflation but later opts for policies that create inflation, inflationary expectations will rise, leading to wage/price adjustments and increased inflation.
Policy Recommendations for Central Bank Credibility
Creating Credibility:
Establishing an independent central bank helps in committing to long-term inflation targets without political interference.
Implementing stricter rules and appointing conservative policymakers to prioritize low inflation over short-term unemployment.
Final Thoughts
The lecture emphasizes the critical interplay between expectations, credibility, and monetary policy in managing the economy effectively. Understanding these dynamics is crucial for both policymakers and economists.