Krugman's Economics Module 2

Business Cycle

Short run alteration between economic downturns (Recessions) and upturns(Expansions)

Depression

Very deep and prolonged downturn

Recessions

periods of economic downturns when output and employment are falling

Expansions

or recoveries, are periods of economic upturns when output and employment are rising

Employment

Number of people currently employed in an economy

Unemployment

Number of people who are actively looking for work but aren't currently employed.

Labor force

Equal to the sum of employment and unemployment

Unemployment rate

the percentage of the labor force that is unemployed

Output

Quantity of goods and services produced

Aggregate output

Economy's total production of goods and services for a given time period

Inflation

Rising overall price level

Deflation

Falling overall price level

Price stability

When an economy's aggregated price level is changing only slowly

Economic growth

An increase in the maximum amount of good and services an economy can produce

Model

A simplified representation used to better understand a real-life situation

Other things equal assumption

Means that all other relevant factors remain unchanged. "Ceteris Paribus

How long is the average Recession?

10 months

How long is the average Expansion?

57 months

Thought experiments

Simplified, hypothetical versions of real-life situations

Why do we talk about business cycles for the economy as a whole, rather than just talking about the ups and downs of particular industries?

We talk about business cycles for the economy as a
whole because recessions and expansions are not confined
to a few industries�they reflect downturns and
upturns for the economy as a whole. The data clearly
show that in the steep downturns, almost every

Describe who gets hurt in a recession and how they are hurt.

Recessions cause a great deal of pain across the entire
society. They cause large numbers of workers to lose their
jobs and make it difficult for workers to find new jobs.
Recessions reduce the standard of living of many families
and are usually associate

During the recession phase of a business cycle, which of the following is likely to increase?

the unemployment rate

The labor force is made up of everyone who is

employed or unemployed.

Which of the following is the most likely result of inflation?

people are discouraged from holding cash

A sustained increase in aggregate output over several decades represents

economic growth

The other things equal assumption allows economists to

focus on the effects of only one change at a time.

Define an expansion and economic growth,and explain the difference between the two concepts.

An expansion can occur regardless of any increase in the economy's long-term potential for production, and it only lasts until the next downturn, while economic growth increases the economy's ability to produce more goods and services over the long term.

Define inflation,and explain why an increase in the price of donuts does not indicate that inflation has occurred.

Inflation is an overall increase in the price of goods and services throughout an economy. If inflation occurs, the price of donuts will most likely increase, but an increase in the price of this one good does not indicate inflation. For example, the pric