see related articles on wikipedia:

• Economic depression
• Economic stagnation
• Great Depression - August 1929 to September 1939: longest (and deepest) recession of the 20th century
• List of recessions in the United States - A list of important recessions in the United States
• Late 2000s recession
• Stagflation

Causes of recessions

• Crisis theory
• Tendency of the rate of profit to fall
• Currency crisis
• Energy crisis
• War
• Underconsumption
• Overproduction
• Financial crisis

Effects of recessions

• Bankruptcies
• Credit crunches
• Deflation (or disinflation)
• Foreclosures
• Unemployment