Unemployment

Types of Unemployment

Unemployment refers to the condition in which individuals who are able and willing to work cannot find jobs. Economists classify unemployment into several types based on its causes and characteristics.

• Frictional Unemployment: Occurs when individuals are temporarily out of work while transitioning from one job to another. This is a normal part of a healthy labor market.

• Cyclical Unemployment: Results from downturns in the business cycle, such as recessions, when overall demand for goods and services declines.

• Structural Unemployment: Arises when there is a mismatch between workers' skills and the requirements of available jobs, often due to technological change or shifts in the economy.

• Seasonal Unemployment: Occurs when people are unemployed at certain times of the year when demand for labor is lower in certain industries (e.g., agriculture, tourism).

Example: A worker who leaves a job to search for a better one experiences frictional unemployment. During a recession, cyclical unemployment rises as businesses lay off workers.

Inflation and Price Indices

Consumer Price Index (CPI)

The Consumer Price Index (CPI) is a measure used to track changes in the price level of a basket of consumer goods and services over time. It is commonly used to measure inflation in the United States.

• Formula:

• Application: If year 4 is the base year and the price per unit in year 3 is \text{CPI in year 3} = \frac{4}{5} \times 100 = 80$

Example: If the CPI in 1914 was 10.0 and the current CPI is 300, a wage of ).

Aggregate Supply and Demand

Aggregate Demand (AD) and Aggregate Supply (AS)

The Aggregate Demand (AD) curve shows the total quantity of goods and services demanded across all levels of an economy at various price levels. The Aggregate Supply (AS) curve shows the total quantity of goods and services that producers are willing and able to supply at different price levels.

• Short-Run Effects: An increase in aggregate demand with constant aggregate supply typically leads to higher price levels (inflation).

• Stagflation: A situation where inflation and unemployment rise simultaneously, often due to a decrease in aggregate supply.

Example: If the government increases spending, shifting the AD curve rightward, output and prices rise in the short run, potentially causing an inflationary gap.

Economic Growth and Production Functions

Production Function

A production function describes the relationship between inputs (such as capital and labor) and the output of goods and services.

• General Form:

  • = Output

  • = Total factor productivity

  • = Capital

  • = Labor

  • = Output elasticity of capital (0 < < 1)

• Returns to Scale: If increasing both and by the same proportion increases by that proportion, the function has constant returns to scale.

Example: If , , and , then for and , will be less than 5, since output increases with inputs but not proportionally if the function is not linear.

Keynesian Multiplier

Expenditure Multiplier

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

• Formula:

• Where: MPC = Marginal Propensity to Consume

• Application: If the government spends ().

• Example Calculation: If MPC = 0.75, then:

Economic Theories and Growth

Malthusian Theory

Thomas Malthus theorized that population growth tends to outpace the growth of resources, leading to recurring cycles of economic hardship and poverty.

• Key Point: When population grows faster than food supply, living standards fall until population is checked by famine, disease, or other factors.

Real GDP per Capita Growth

Real GDP per capita growth is a key indicator of economic well-being. It is calculated as:

• Formula:

• Application: An increase in nominal GDP growth and a decrease in inflation will unambiguously increase real GDP per capita growth, assuming other factors are constant.

Phillips Curve

Relationship Between Inflation and Unemployment

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

• Short Run: The curve is typically upward sloping in the short run and vertical in the long run, reflecting that lower unemployment can be associated with higher inflation temporarily.

• Long Run: In the long run, the curve is vertical, indicating no trade-off between inflation and unemployment.

Inflation Adjustment Example

Adjusting Historical Wages for Inflation

To compare wages across time, adjust for inflation using the CPI:

• Formula:

• Example: A ; for an 8-hour day, $150/8 = $18.75 per hour.

Summary Table: Types of Unemployment

Additional info:

• Stagflation refers to the combination of high inflation and high unemployment, as seen in the 1970s.

• The AD-AS model is central to understanding short-run fluctuations in output and prices.

• GDP (Gross Domestic Product) measures the total value of goods and services produced in a country, but is not a direct measure of inflation.