New evidence of the expectation hypothesis of interest rates: a flexible nonlinear approach

Medhi Mili, Jean-Michel Sahut and Frédéric Teulon

Applied Financial Economics, 2012, vol. 22, issue 2, 165-176

Abstract: Conventional approaches to examining the Expectation Hypothesis (EH) assume a parametric linear specification among variables. In contrast, this article tests the hypothesis using a flexible nonlinear inference approach proposed by Hamilton (2001). We examine the impact of the nonlinearity of interest rates to explain the variability of risk premia on market rates. It is assumed that the term structure of interest rates can be identified by two factors, the risk-free rate and its volatility. The results of the linearity test against nonlinear alternatives suggest that there is clear evidence of nonlinearity. Our empirical application shows that correctly accounting for the nonlinearity of the term structure of interest rates may explain the variability of risk premia and the specific characteristics of interest rate dynamics on the US market.

Date: 2012
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DOI: 10.1080/09603107.2011.607127

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