In regards to the long-run effects of a money supply change, the monetarist model is the same as the Keynesian model.

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The monetarist model emphasizes the long-term neutrality of money, suggesting that changes in the money supply only affect nominal variables and not real variables like output. In contrast, the Keynesian model allows for money supply changes to have long-term effects on real variables due to price and wage rigidities.

In Regards to the Long-Run Effects of a Money Supply