Book cover for The Economics of Money, Banking, and Financial Markets

The Economics of Money, Banking, and Financial Markets

Frederic S. Mishkin

ISBN #9780132770248

10th Edition

610 Questions

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33,211 Students Helped

Homework Questions

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Summary
Learning Objectives
Key Concepts
Example Problems
Explanations
Common Mistakes

Summary

The chapter emphasizes that public expectations are a critical component in monetary policy evaluation. The Lucas Critique challenges the reliability of historical econometric models by highlighting that shifts in policy alter these expectations and, consequently, the economic outcomes. By comparing policy rules with discretionary approaches, and proposing a balanced strategy through constrained discretion, central bank credibility and nominal anchors emerge as essential tools for stabilizing inflation and output. Real-world examples such as interest rate term structures and the handling of oil price shocks underscore the practical implications of these concepts.

Learning Objectives

1

Explain the Lucas Critique and its challenge to traditional macroeconometric models in policy evaluation.

2

Analyze the impact of changing public expectations on the stability of economic relationships.

3

Differentiate between policy rules, discretionary approaches, and constrained discretion in monetary policy.

4

Evaluate the importance of central bank credibility and nominal anchors in stabilizing inflation and output.

Key Concepts

CONCEPT

DEFINITION

Lucas Critique

A critique arguing that relying on historical macroeconometric models for policy evaluation is flawed because individuals change their expectations in response to policy shifts, thereby altering empirical relationships.

Nominal Anchor

A fundamental benchmark, such as an inflation target, used by central banks to stabilize expectations about future inflation.

Constrained Discretion

A policy strategy that combines the flexibility of discretionary decision-making with constraints provided by explicit rules or targets to maintain credibility.

Policy Rules

Pre-determined guidelines that dictate monetary policy decisions, minimizing discretion and the potential for shifts in public expectations.

Discretionary Approach

A method of policy-making where decisions are made on a case-by-case basis, which can lead to unpredictable outcomes as public expectations adjust to these shifts.

Example Problems

Example 1

What does the Lucas critique say about the limitations of our current understanding of the way the economy works?

Example 2

"The Lucas critique by itself casts doubt on the ability of discretionary stabilization policy to be beneficial." Is this statement true, false, or uncertain? Explain your answer

Example 3

Suppose an econometric model based on past data predicts a small decrease in domestic investment when the Federal Reserve increases the federal funds rate. Assume that the Federal Reserve is considering an increase in the federal funds rate target to fight inflation and promote a low inflation environment that promotes investment and economic growth. a. Discuss the implications of the econometric model's predictions if individuals interpret the increase in the federal funds rate target as a sign that the Fed will keep inflation at low levels in the long run. b. What would be Lucas's critique of this model?

Example 4

If the public expects the Fed to pursue a policy that is likely to raise short-term interest rates permanently to $12 \%,$ but the Fed does not go through with this policy change, what will happen to long-term interest rates? Explain your answer.

Example 5

In what sense can greater central bank independence make the time-inconsistency problem worse?

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Step-by-Step Explanations

QUESTION

How does the Lucas Critique challenge the use of historical macroeconometric models for policy evaluation?

STEP-BY-STEP ANSWER:

Step 1: Identify that traditional macroeconometric models assume stable relationships based on historical data.
Step 2: Recognize that the Lucas Critique argues these relationships change when policymakers alter their strategies because individuals adjust their expectations.
Step 3: Understand that these adjusted expectations lead to different economic behaviors, rendering historical relationships unreliable for future policy predictions.
Step 4: Conclude that policy evaluation must account for the dynamic nature of expectations instead of relying solely on past empirical data.
Final Answer: The Lucas Critique highlights that historical macro models are insufficient for policy evaluation since they fail to incorporate how changes in policy can alter economic agents’ behavior and expectations.

Lucas Critique

QUESTION

What is constrained discretion and how does it act as a compromise between policy rules and discretionary approaches?

STEP-BY-STEP ANSWER:

Step 1: Define policy rules as fixed guidelines and the discretionary approach as flexible but unpredictable policy-making.
Step 2: Understand that constrained discretion allows policymakers to have some flexibility while still following predetermined targets or rules.
Step 3: Recognize that this balance helps maintain credibility by anchoring expectations, even when adjustments are necessary.
Step 4: See how central bank credibility and nominal anchors work within this framework to stabilize economic outcomes.
Final Answer: Constrained discretion combines the strengths of both rigid policy rules and flexible discretionary actions, providing a balanced approach that maintains credibility and stabilizes economic expectations.

Constrained Discretion

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Common Mistakes

  • Assuming historical relationships in macroeconometric models remain stable regardless of policy changes.
  • Overlooking the role of public expectations in influencing economic outcomes.
  • Confusing discretionary approaches with effective, credible policy implementation.
  • Underestimating the importance of nominal anchors in maintaining economic stability.