This concept, of a vertical long-run Phillips curve, was an important buttress for the subsequent move to Central Bank independence, with a mandate to concentrate on price stability via an inflation target. With such a Phillips curve, Central Bank measures to maintain price stability would not of themselves affect longer-run employment, growth or productivity, which were (in the long term) determined by supply-side factors, not by monetary, short-term demand-side policies.3 Thus, concentration on the control of inflation, via monetary policies, would be of itself beneficial, with no offsetting
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