Whatever our views, NAIRU provides a structure of policy for the central bank. Not quite. Take Africa. Definition of employment is fuzzy, which should be a point of different not value judgement. Wage inflation, we cannot measure it if we cannot define employment. Consequently, the central bank has no structure for policy. They will leave graduate schools in the West armed with NAIRU and kindred frames. How often do they go back with the fundamentals of dynamical systems that would allow them mould appropriate frames? We would make progress if development economics found physics. How?

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