Para Politikasında Zaman Tutarsızlığı

Bu çalışmanın amacı, para politikasının zaman tutarsızlığı problemini ortaya koymaktır. Makroekonomik teoride para otoritesinin ekonomik faaliyet içerisindeki rolü ve davranış şekilleri, oyun teorisine dayanılarak açıklanmaktadır. Oyun teorik para politikası modellerinde, para otoritesi ile özel sektör karşılıklı etkileşim içindedirler. Para otoritesinin oyuncu olarak hedefi, belirlenmiş bir refah fonksiyonunu maksimize etmektir. Para otoritesi bu hedefi gerçekleştirirken izleyeceği politikalarda zaman tutarsız bir davranış gösterebilecektir. Zaman tutarsızlığı, politika yapıcının önceden ilan ettiği politikayı gelecekte değiştirmesi ve uygulamaması durumunda ortaya çıkmaktadır. Zaman tutarsızlığı para politikasının enflasyonist bir eğilime sahip olduğunu göstermektedir. Bu yüzden para otoriteleri, zaman tutarsızlığı problemini çözerek enflasyonist eğilimi ortadan kaldırmanın yolunu aramalıdırlar.

The Time-Inconsistency in Monetary Policy

The aim of this paper is to discuss the time inconsistency problem in monetary policies. In macroeconomic theory the role and actions of monetary authority are explained by reference to game theory. In game-theoretic monetary policy models, monetary authority and private sector act interactively. The target of monetary authority as a player is to maximize the pre-delermined welfare function. In trying to realize this target by applying monetary policies, monetary authority might behave in time-inconsistent manner. The time-inconsistency appears when monetary authority changes the policy that he declared before. The lime-inconsistency implies that monetary policy has an inflationary tendencies. In order to overcome inflationary tendencies, monetary authorities should try toflnd ways and policies thai would solve the lime-inconsistency.

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