Macroeconomics Study Notes: Unemployment, Inflation, and Deflation

Chapter 7: The Macroeconomy – Unemployment, Inflation, and Deflation

Introduction

This chapter explores key macroeconomic indicators: unemployment, inflation, and deflation. Understanding these concepts is essential for analyzing the health and fluctuations of an economy.

• Unemployment rate is a widely reported statistic, but its calculation is based on two separate surveys, which can yield different results.

• Divergences in survey results may cause the government to overestimate or underestimate monthly employment figures.

Learning Objectives

• Explain how the U.S. government calculates the official unemployment rate.

• Discuss the types of unemployment.

• Describe how price indexes are calculated and define key types of price indexes.

• Evaluate who loses and who gains from inflation and distinguish between nominal and real interest rates.

• Understand key features of business fluctuations.

Unemployment

Definition and Economic Impact

Unemployment refers to the total number of adults (aged 16 years or older) who are willing and able to work and who are actively looking for work but have not found a job. Unemployment imposes a cost on the economy in terms of lost output, often amounting to billions of dollars.

Labor Force

• Labor force: Individuals aged 16 years or older who either have jobs or are looking and available for jobs.

• The labor force is the sum of the employed and the unemployed.

Categories of Unemployed Individuals

• Job loser: Involuntarily terminated; 40–60% of the unemployed.

• Reentrant: Previously left the labor force, now reentering; 20–30%.

• Job leaver: Voluntarily quits; 10–15%.

• New entrant: Never held a full-time job for two weeks or longer; 10–15%.

Duration and Measurement

• Duration of unemployment has averaged about 17 weeks over the past 25 years. Longer durations can raise the unemployment rate, especially during economic downturns.

• Discouraged workers are individuals who have stopped looking for a job because they believe none are available. Their existence can bias the unemployment rate downward, as they are not counted as unemployed.

• Labor force participation rate: The percentage of noninstitutionalized working-age individuals who are employed or seeking employment.

Stocks vs. Flows

• Stock: Quantity measured at a given point in time (e.g., inventory).

• Flow: Quantity measured per unit of time (e.g., income per year).

The Major Types of Unemployment

Overview

Unemployment can be classified into three major types, each with distinct causes and policy implications.

• Frictional unemployment: Temporary unemployment as workers search for suitable jobs. This is a normal part of labor market dynamics.

• Structural unemployment: Long-term unemployment due to mismatches between workers' skills and job requirements, or due to changes in business regulations and labor market policies.

• Cyclical unemployment: Unemployment resulting from business recessions when aggregate demand is insufficient to create full employment.

Full Employment and the Natural Rate

• Full employment: An arbitrary level of unemployment that corresponds to "normal" friction in the labor market.

• Natural rate of unemployment: The unemployment rate prevailing in long-run macroeconomic equilibrium, including only frictional and structural unemployment (not cyclical).

Inflation and Deflation

Definitions

• Inflation: A sustained increase in the average of all prices of goods and services in an economy.

• Deflation: A sustained decrease in the average of all prices of goods and services in an economy.

Purchasing Power

• Purchasing power: The value of money for buying goods and services. It varies with prices and income.

Nominal vs. Real Values

• Nominal value: Price expressed in today's dollars.

• Real value: Value expressed in purchasing power, adjusted for inflation.

Measuring Inflation: Price Indexes

• Market basket: A representative bundle of goods and services used to track price changes over time.

• Base year: The year chosen as a reference point for price comparisons.

• Price index formula: $\text{Price Index} = \frac{\text{Cost of market basket today}}{\text{Cost of market basket in base year}} \times 100$

Example Table: Calculating a Price Index for a Two-Good Market Basket

Commodity	Quantity	Price per Unit (2017)	Market Basket Cost (2017)	Price per Unit (2027)	Market Basket Cost (2027)
Good A	100	$4	$400	$8	$800
Good B	50	$9	$450	$7	$350
Good C	1	$1,300	$1,300	$1,500	$1,500

Price Index (2027): $\frac{2650}{2150} \times 100 = 123.26$ (Additional info: Example calculation based on inferred totals)

Types of Price Indexes

• Consumer Price Index (CPI): Measures the weighted average of prices of a specified set of goods and services purchased by typical consumers in urban areas. Used to adjust Social Security benefits for inflation.

• Producer Price Index (PPI): Measures the average prices of goods and services produced and sold by firms. Used as a leading indicator for CPI.

• GDP Deflator: Measures changes in prices of all new goods and services produced in the economy. Not based on a fixed market basket.

• Personal Consumption Expenditure (PCE) Index: Uses annually updated weights based on consumer spending surveys. Primary inflation indicator for the Federal Reserve.

Core and Supercore Inflation

• Core CPI: Excludes food and energy prices to provide a less volatile measure of inflation.

• Supercore CPI: Further excludes housing prices for an even narrower focus.

Anticipated Versus Unanticipated Inflation

Definitions and Effects

• Anticipated inflation: The inflation rate expected to occur.

• Unanticipated inflation: Inflation that comes as a surprise, either higher or lower than expected.

• Unanticipated inflation imposes greater costs on households and firms, as they cannot take protective actions in advance.

Interest Rates

• Nominal interest rate: The market rate of interest expressed in current dollars.

• Real interest rate: The nominal rate minus the anticipated rate of inflation. $\text{Real Interest Rate} = \text{Nominal Interest Rate} - \text{Expected Inflation Rate}$ Example: If nominal rate is 5% and expected inflation is 3%, real rate is 2%.

Winners and Losers from Inflation

• Creditors lose and debtors gain from unanticipated inflation, as the nominal interest rate may not fully compensate for actual inflation.

• Cost-of-living adjustments (COLAs) in contracts help protect against inflation by increasing nominal values as the cost of living rises.

• Menu costs: The resource cost of inflation, including expenses for repricing goods and services.

Business Fluctuations

Definitions and Phases

• Business fluctuations: The ups and downs in business activity throughout the economy.

• Expansion: Period when economic activity is speeding up.

• Contraction: Period when economic activity is slowing down.

• Recession: A period of negative or below-trend growth in business activity.

• Depression: An extremely severe recession.

Business Cycle Indicators

• Leading indicators: Events that occur before changes in business activity, such as reductions in the average workweek, rises in unemployment insurance claims, decreases in raw material prices, and drops in the quantity of money circulating.

Trends in U.S. Business Cycles

• Since 1945, contractions have shortened (average 10 months), and expansions have lengthened (average 64 months), possibly due to more effective policy interventions or changes in economic structure.

Summary Table: Types of Unemployment

Type	Cause	Duration	Policy Implications
Frictional	Job search and matching	Short-term	Improve information flow
Structural	Skill mismatch, regulations	Long-term	Retraining, education, policy reform
Cyclical	Business cycle downturns	Variable	Stimulus, monetary/fiscal policy

Key Formulas

• Unemployment Rate: $\text{Unemployment Rate} = \frac{\text{Number of Unemployed}}{\text{Labor Force}} \times 100$

• Price Index: $\text{Price Index} = \frac{\text{Cost of Market Basket Today}}{\text{Cost of Market Basket in Base Year}} \times 100$

• Real Interest Rate: $\text{Real Interest Rate} = \text{Nominal Interest Rate} - \text{Expected Inflation Rate}$

Additional info:

• Social media influencers are classified as self-employed workers in labor force statistics.

• Monthly employment reports may underestimate total employment due to survey limitations, especially regarding self-employed individuals.