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Answer to Question #13076 in Biochemistry for sandrinah hausiku

Question #13076
explain why it is not a sustainable policy to attempt to keep unemploymment below its natural level according to the augmented Phillips Curve model.
Expert's answer
The augmented Phillips Curve allows for shifts in the tradeoff between inflation
and unemployment as the core-rate of inflation changes. According to this model
we can have an unemployment rate below the natural rate of unemployment
(assuming away the complication of supply shocks) if our actual rate of inflation is
above the core of inflation. The fundamental reason for the nonsustainability of
such a low rate of unemployment comes from the fact that the core rate of inflation
is based upon expectations of future inflation and these expectations are related to
historical experience. Eventually after a string of quarters where the actual rate of
inflation has exceeded the core rate of inflation, the core rate of inflation would
begin to ratchet upwards with rising inflationary expectations. That means the
Phillips Curve tradeoff would shift upwards and the lower rate of unemployment
would require a rate of inflation even higher than before. Core-inflation would
follow (or even anticipate) this acceleration of inflation rates.

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