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2017•RePEc: Research Papers in EconomicsOpen access

Pure Theory of the Federal Funds Rate

Stefan Homburg

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Abstract

The effective federal funds rate is determined in a competitive interbank market, while the target federal funds rate represents a policy variable. This paper proposes a theory of the determination of the effective funds rate. According to the main result, the latter is a Lagrange multiplier that vanishes if excess reserves emerge. This is exactly what happened in the United States in September 2008. A final section considers interest on reserves.

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The effective federal funds rate is determined in a competitive interbank market, while the target federal funds rate represents a policy variable. This paper proposes a theory of the determination of the effective funds rate. According to the main result, the latter is a Lagrange multiplier that vanishes if excess reserves emerge. This is exactly what happened in the United States in September 2008. A final section considers interest on reserves.

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Available abstract

The effective federal funds rate is determined in a competitive interbank market, while the target federal funds rate represents a policy variable. This paper proposes a theory of the determination of the effective funds rate. According to the main result, the latter is a Lagrange multiplier that vanishes if excess reserves emerge. This is exactly what happened in the United States in September 2008. A final section considers interest on reserves.

Key concepts: Federal funds, Interbank lending market, Excess reserves, Monetary economics, Economics, Global assets under management, Interest rate, Bank reserves

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