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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Summary
Learning Objectives
Key Concepts
Example Problems
Explanations
Common Mistakes

Summary

Chapter 23 explores monetary policy theory with a focus on how central banks respond to different economic shocks. It highlights the mechanism of stabilizing inflation and output under aggregate demand and permanent supply shocks through the concept of divine coincidence, while outlining the challenges posed by temporary supply shocks. The chapter also reviews the tools available to policymakers, including conventional interest rate adjustments and unconventional methods like quantitative easing, emphasizing the impact of policy lags on the timing and effectiveness of these measures.

Learning Objectives

1

Explain the role of monetary policy in stabilizing economic activity during different types of shocks.

2

Identify and distinguish between aggregate demand shocks, permanent supply shocks, and temporary supply shocks.

3

Analyze the concept of divine coincidence and its relevance in policy stabilization regarding inflation and output.

4

Evaluate the use of conventional tools (interest rate adjustments) and unconventional tools (quantitative easing) in responding to economic shocks.

5

Understand the challenges posed by policy lags in the effective implementation of monetary measures.

Key Concepts

CONCEPT

DEFINITION

Monetary Policy

A set of actions by a central bank aimed at controlling the money supply and interest rates to achieve macroeconomic stability, including stable inflation and output close to potential levels.

Aggregate Demand Shock

An unexpected event that affects the total demand for goods and services in an economy, often requiring policy adjustments to stabilize output and inflation.

Permanent Supply Shock

A long-lasting change in the productive capacity of an economy that affects both output and prices, where stabilizing inflation tends to align with stabilizing economic activity.

Temporary Supply Shock

A short-term disturbance that affects the supply side of the economy, presenting a trade-off for policymakers between targeting inflation and stabilizing output.

Divine Coincidence

A theoretical condition where policies that stabilize inflation also automatically stabilize output, particularly relevant in the context of permanent shocks.

Policy Lags

The delays inherent in the process of recognizing economic shocks, deciding on a policy response, and seeing the effects of monetary policy in the economy.

Quantitative Easing

An unconventional monetary policy tool that involves purchasing longer-term securities to increase money supply and lower interest rates when conventional tools are insufficient.

Example Problems

Example 1

What does it mean for the inflation gap to be negative?

Example 2

"If autonomous spending falls, the central bank should lower its inflation target in order to stabilize inflation." Is this statement true, false, or uncertain? Explain your answer.

Example 3

For each of the following shocks, describe how monetary policymakers would respond (if at all) to stabilize economic activity. Assume the economy starts at a longrun equilibrium. a. Consumers reduce autonomous consumption. b. Financial frictions decrease. c. Government spending increases. d. Taxes increase. e. The domestic currency appreciates.

Example 4

During the global financial crisis, how was the Fed able to help offset the sharp increase in financial frictions, without the ability to lower interest rates further? Did it work?

Example 5

Why does the divine coincidence simplify the job of policy making?
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Step-by-Step Explanations

QUESTION

How does monetary policy respond to a temporary supply shock, and what trade-offs does it face?

STEP-BY-STEP ANSWER:

Step 1: Identify the shock as temporary, which implies the disturbance in the supply is short-term rather than permanent.
Step 2: Understand that targeting the inflation rate may conflict with maintaining output at its potential, as inflation stabilization might require tighter monetary measures.
Step 3: Recognize that policymakers face a trade-off between achieving low inflation and supporting output, meaning they must decide which objective to prioritize in the short run.
Step 4: Analyze the tool choices available; while interest rate adjustments serve as the conventional approach, unconventional policies like quantitative easing can be used when interest rate changes alone are insufficient.
Step 5: Consider policy lags, understanding that the impact of any chosen tool may not be immediate, complicating timely stabilization.
Final Answer: In response to a temporary supply shock, monetary policy employs a mix of conventional and unconventional tools, balancing the short-term trade-off between inflation control and output stabilization while contending with inherent lags in policy effectiveness.

Response to a Temporary Supply Shock

QUESTION

What is divine coincidence and how does it simplify the stabilization strategy under certain shocks?

STEP-BY-STEP ANSWER:

Step 1: Define divine coincidence as the alignment of stabilizing inflation with stabilizing economic activity in the case of specific shocks.
Step 2: Focus on the context of aggregate demand shocks and permanent supply shocks where the objectives of inflation control and output stabilization coincide.
Step 3: Explain that in such cases, policy measures that target inflation inherently work to keep output close to its potential, thus simplifying the policy response.
Final Answer: Divine coincidence refers to the situation where measures taken to stabilize inflation also stabilize output, simplifying monetary policy decisions in response to aggregate demand and permanent supply shocks.

Divine Coincidence in Policy Response

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Common Mistakes

  • Confusing the effects of temporary supply shocks with those of permanent supply shocks.
  • Assuming that the same policy tools and outcomes apply uniformly across all types of shocks.
  • Overlooking the importance of policy lags when evaluating the efficacy of monetary interventions.
  • Misinterpreting divine coincidence as a universal phenomenon, rather than context-dependent.
  • Underestimating the role and impact of unconventional policies like quantitative easing during economic disturbances.