Unemployment

Types of Unemployment

Unemployment refers to the condition in which people who are able and willing to work are unable to find jobs. Economists classify unemployment into several types:

• Frictional Unemployment: Occurs when workers are temporarily between jobs or are searching for new jobs. Example: A recent graduate looking for their first job.

• Cyclical Unemployment: Results from downturns in the business cycle, such as recessions. Example: Factory workers laid off during an economic recession.

• Structural Unemployment: Caused by changes in the economy that make certain skills obsolete. Example: Workers replaced by automation.

• Seasonal Unemployment: Occurs due to seasonal variations in demand for labor. Example: Agricultural workers during the off-season.

Key Fact: During a recession, cyclical unemployment is most likely to increase.

Inflation and Price Indices

Consumer Price Index (CPI)

The Consumer Price Index (CPI) measures the average change over time in the prices paid by urban consumers for a fixed basket of goods and services. It is a key indicator used to track inflation.

• Formula:

• Example Calculation: If the base year is Year 4 and the price level is set to 100, then for other years:

  • Year 1:

  • Year 2:

Key Fact: If the CPI rises from 120 to 126, prices have increased by 5 percent.

Measures of Inflation

• CPI is the most common measure used to track inflation in the United States.

• Other measures include the GDP Deflator and the Producer Price Index (PPI).

Phillips Curve

Inflation and Unemployment Trade-off

The Phillips Curve illustrates the inverse relationship between inflation and unemployment in the short run.

• Short Run: As inflation rises, unemployment tends to fall (negative relationship).

• Long Run: The relationship may not hold; the curve becomes vertical at the natural rate of unemployment.

Key Fact: The Phillips Curve is consistent with a model of sticky nominal wages and upward-sloping aggregate supply in the short run.

GDP and Economic Growth

Gross Domestic Product (GDP)

GDP is the total market value of all final goods and services produced within a country in a given period.

• Nominal GDP: Measured at current prices.

• Real GDP: Adjusted for inflation.

• GDP per Capita:

Economic Growth Rate

• Real GDP per capita growth rate:

Example: If nominal GDP grows at 12%, inflation is 8%, and population grows at 3%, then real GDP per capita grows at 1%.

Production Function

The production function describes the relationship between inputs (labor, capital) and output (GDP).

• General Form: , where is output, is capital, is labor, is total factor productivity, and .

• Constant Returns to Scale: If both inputs double, output also doubles.

• Diminishing Marginal Returns: Increasing one input while holding the other constant leads to smaller increases in output.

Multiplier Effect

Keynesian Expenditure Multiplier

The Keynesian multiplier measures the change in GDP resulting from a change in autonomous spending.

• Formula:

• Example: If MPC = 0.75, then

• Application: If government spending increases by .

Labor Market Indicators

Labor Force Participation and Unemployment Rate

• Labor Force Participation Rate:

• Unemployment Rate:

• Example: If the labor force is 150 million and employed is 144 million, then unemployed is 6 million. Unemployment rate = .

Inflation Effects and Hyperinflation

Consequences of Inflation

• Unexpected Inflation: Redistributes wealth from lenders to borrowers.

• Hyperinflation: Extremely rapid inflation, often exceeding 50% per month. Example: Prices doubling every week in Zimbabwe (2007-9).

• Purchasing Power: If inflation is higher than expected, borrowers benefit and lenders lose.

Economic Growth and Living Standards

Long-Term Growth

Economic growth is the increase in potential GDP over time, not short-term fluctuations.

• Driven by increases in labor, capital, and total factor productivity.

• Improves living standards, but excessive growth can have drawbacks such as environmental degradation.

Tables

Sample CPI Calculation Table

Additional info: CPI calculations use the base year price level as 100 and compare other years accordingly.

Dexter CPI Calculation Table

Additional info: The reference base period for Dexter's CPI is 2020.

Key Terms and Definitions

• Aggregate Demand (AD): Total demand for goods and services in an economy.

• Aggregate Supply (AS): Total supply of goods and services that firms in an economy plan on selling during a specific time period.

• Natural Rate of Unemployment: The rate of unemployment arising from frictional and structural factors, not cyclical ones.

• Output Gap: The difference between actual GDP and potential GDP.