CAUSES OF INFLATION
Inflation may be caused by an increase in the quantity of money in circulation. This has been seen most graphically when governments have financed spending in a crisis by printing money excessively, often leading to hyperinflation where prices rise at extremely high rates. Another cause can be a rapid decline in the demand for money as happened in Europe during the black plague.
The money supply is also thought to play a role in determining levels of more moderate levels of inflation, although there are differences of opinion on how important it is. For example, Monetarist economists believe that the link is very strong; Keynesian economics by contrast typically emphasize the role of aggregate demand in the economy rather than the money supply in determining inflation.
Inflation may be caused by an increase in the quantity of money in circulation. This has been seen most graphically when governments have financed spending in a crisis by printing money excessively, often leading to hyperinflation where prices rise at extremely high rates. Another cause can be a rapid decline in the demand for money as happened in Europe during the black plague.
The money supply is also thought to play a role in determining levels of more moderate levels of inflation, although there are differences of opinion on how important it is. For example, Monetarist economists believe that the link is very strong; Keynesian economics by contrast typically emphasize the role of aggregate demand in the economy rather than the money supply in determining inflation.
A fundamental concept in such Keynesian analysis is the relationship between inflation and unemployment, called the Phillips curve. This model suggested that price stability was a trade off against employment. Therefore some level of inflation could be considered desirable in order to minimize unemployment. The Philips curve model described the US experience well in the 1960s, but failed to describe the combination of rising inflation and economic stagnation (sometimes referred to as stagflation) experienced in the 1970s.
Another Keynesian concept is the natural gross domestic product, a level of GDP where the economy is at its optimal level of production. If GDP exceeds its natural level, inflation will accelerate as suppliers increase their prices. If GDP falls below its natural level, inflation will decelerate as suppliers attempt to fill excess capacity.
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