Reining in inflation requires not only changing monetary policy but also changing the behavior of consumers, employers and workers. The role of a sudden, jarring policy shift is that it quickly alters expectations, signaling to the public that the rules of the game have changed dramatically—prices will not keep rising, nor will wages. According to this theory, the faster expectations of inflation are driven down, the shorter the painful period of recession and high unemployment will be. However, particularly in countries where the political class has lost its credibility with the public, only
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