Hahn's problem

Hahn's problem (or Hahn's question) refers to the theoretical challenge of building general equilibrium models where money does not enter preferences, yet has a positive equilibrium value. Money, since it is intrinsically worthless and is not demanded for its own sake, may not be made to enter the utility function and be present like any other good. The problem is named after the British economist Frank Hahn, who outlined it in his critique of Don Patinkin's placing money inside the utility function.[1]

References

Hahn, Frank (1965). "On Some Problems of Proving the Existence of an Equilibrium in a Monetary Economy". In Hahn; Brechling (eds.). Theory of Interest Rates. London: Macmillan. OCLC 00284573.

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[1] Hahn, Frank (1965). "On Some Problems of Proving the Existence of an Equilibrium in a Monetary Economy". In Hahn; Brechling (eds.). Theory of Interest Rates. London: Macmillan. OCLC 00284573.