The economic stability of a country is often indicated by its level of industrial production, unemployment and GDP. An economic recession is a financial crisis that causes a reduction of all the three indicators of economic stability. In the United States, there have been several recessions over the years. However, two stand out as having the most significant impact on the economy. These are the Great Depression that occurred between October 1929 and 1939, and the Recession of 2007 to 2009.