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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Homework Questions

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Summary
Learning Objectives
Key Concepts
Example Problems
Explanations
Common Mistakes

Summary

This chapter section explains how planned expenditure drives aggregate demand in the goods market, leading to equilibrium output when production matches demand. It details the roles of the consumption and investment functions and describes the derivation of the IS curve, which represents the set of equilibrium points for different real interest rates. Shifts in the IS curve occur due to changes in autonomous spending factors, providing insight into the effects of both fiscal and monetary policy on the economy.

Learning Objectives

1

Explain the concept of planned expenditure and its role in determining aggregate demand in the goods market.

2

Identify and describe the components of aggregate demand, including the consumption and investment functions.

3

Demonstrate how equilibrium output is achieved when aggregate demand equals production.

4

Derive the IS curve and explain its representation of equilibrium points at varying real interest rates.

5

Analyze how shifts in the IS curve are influenced by changes in autonomous spending factors, such as government purchases, taxes, and financial frictions.

Key Concepts

CONCEPT

DEFINITION

Planned Expenditure

The total amount that households, businesses, and governments intend to spend on goods and services at a given level of income.

Aggregate Demand

The sum of all demand in the economy for final goods and services, which includes consumption, investment, government spending, and net exports.

Consumption Function

A mathematical relationship that expresses consumer spending as a function of disposable income.

Investment Function

A relationship that shows how planned investment spending varies with factors such as interest rates and expected returns.

Equilibrium Output

The level of production at which aggregate demand equals the output produced in the economy.

IS Curve

A curve representing combinations of interest rates and levels of output where the goods market is in equilibrium.

Autonomous Spending

Components of aggregate demand (like government purchases, taxes, and investment not driven by current income) that are independent of the level of current economic output.

Financial Frictions

Impediments in the financial markets, such as credit constraints or information asymmetries, that affect the cost and availability of funds for investment.

Example Problems

Example 1

"When the stock market rises, investment is increasing." Is this statement true, false, or uncertain? Explain your answer

Example 2

Why is inventory investment counted toward aggregate spending if it isn't actually sold to the final end user?

Example 3

"since inventories can be costly to hold, firms' planned inventory investment should be zero, and firms should acquire inventory only through unplanned inventory accumulation." Is this statement true, false, or uncer- tain? Explain your answer

Example 4

During and in the aftermath of the financial crisis of $2007-2009,$ planned investment fell substantially, despite significant decreases in the real interest rate. What factors related to the planned investment function could explain this?

Example 5

If households and firms believe the economy will be in a recession in the future, will this necessarily cause a recession, or have any impact on output at all?
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Step-by-Step Explanations

QUESTION

How is equilibrium output determined in the context of planned expenditure and aggregate demand?

STEP-BY-STEP ANSWER:

Step 1: Define Planned Expenditure – Recognize that planned expenditure consists of consumption, investment, government spending, and net exports (if applicable).
Step 2: Establish Aggregate Demand – Combine these components to form the overall aggregate demand in the economy.
Step 3: Equate with Production – Set the planned expenditure equal to actual production (output), as equilibrium is reached when what is produced equals what is demanded.
Step 4: Solve for Equilibrium Output – Use the consumption and investment functions, along with other autonomous spending factors, to solve for the level of output where the equality holds.
Final Answer: Equilibrium output is the level of production at which the sum of consumption, investment, and other autonomous spending exactly equals the goods produced in the economy.

Equilibrium Output in the Goods Market

QUESTION

What steps are involved in deriving the IS curve from goods market equilibrium?

STEP-BY-STEP ANSWER:

Step 1: Start with the Equilibrium Condition – Use the fact that aggregate demand equals production at equilibrium.
Step 2: Incorporate the Consumption and Investment Functions – Include the consumption function (dependent on income) and the investment function (sensitive to the real interest rate).
Step 3: Express the Relationship – Manipulate the equilibrium condition to express output as a function of the real interest rate.
Step 4: Identify the IS Curve – Recognize that this relationship, showing equilibrium output at different interest rates, is depicted by the IS curve.
Final Answer: The IS curve is derived by setting planned expenditure equal to production and solving for output as it varies with the real interest rate.

Derivation of the IS Curve

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Common Mistakes

  • Confusing planned expenditure with actual expenditure, leading to errors in identifying the equilibrium output.
  • Neglecting the impact of autonomous factors (such as government spending and taxes) when analyzing shifts in the IS curve.
  • Overlooking the role of the real interest rate in influencing investment spending and thus aggregate demand.
  • Assuming that changes in monetary policy only affect the IS curve, without considering the interplay with fiscal policy.