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Monday, January 11, 2010

Austrian business cycle theory

The Austrian business cycle theory is an explanation of the phenomenon of business cycles held by the Austrian School of economics. The theory views business cycles (or, as some Austrians prefer, "credit cycles") as the inevitable consequence of excessive growth in bank credit, exacerbated by inherently damaging and ineffective central bank policies, which cause interest rates to remain too low for too long, resulting in excessive credit creation, speculative economic bubbles and lowered savings.[1]
The theory proposes that a sustained period of low interest rates and excessive credit creation results in a volatile and unstable imbalance between saving and investment.[2] According to the theory, the business cycle unfolds in the following way. Low interest rates tend to stimulate borrowing from the banking system. This expansion of credit causes an expansion of the supply of money, through the money creation process in a fractional reserve banking system. This in turn leads to an unsustainable credit-sourced boom during which the artificially stimulated borrowing seeks out diminishing investment opportunities. This credit-sourced boom results in widespread malinvestments, causing capital resources to be misallocated into areas that would not attract investment if the money supply remained stable. A correction or "credit crunch" – commonly called a "recession" or "bust" – occurs when exponential credit creation cannot be sustained. Then the money supply suddenly and sharply contracts when markets finally "clear", causing resources to be reallocated back towards more efficient uses. The main proponents of the Austrian business cycle theory historically were Ludwig von Mises and Friedrich Hayek. Hayek won a Nobel Prize in economics in 1974 (shared with Gunnar Myrdal) in part for his work on this theory.[3][4]
Austrian business cycle theory contradicts mainstream economic understanding of business cycles, and is generally rejected by mainstream economists. Economists such as Milton Friedman,[5][6] Gordon Tullock,[7] Bryan Caplan,[8] and Paul Krugman[9] have said that they regard the theory as incorrect.

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