Don't get me wrong. The Nash is genius and I love to study game theory. Still, I'm not convinced that deflation is preferable. I'm a firm believer that money needs elasticity to meet demands of the economic cycles.
Deflation puts long term borrowers at extreme disadvantage. Deflation makes it hard for people to make big purchase like a house, student loan, medical bills.
In any case the macro is more complex than the neoi classical model I'm presenting. At the macro level, deflation can lead to recession and depressions
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