Walvelet Analysis of Commodity Price Behavior

  • Authors:
  • Russell Davidson;Walter C. Labys;Jean-Baptiste Lesourd

  • Affiliations:
  • Queen‘s University Kingston, Ontario, Canada and GREQAN Marseille, France;West Virginia University;GREQAN Marseille, France

  • Venue:
  • Computational Economics
  • Year:
  • 1998

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Abstract

We propose a form of semi-nonparametric regression based on waveletanalysis. Traditional time series methods usually involve either the timeor the frequency domain, but wavelets can combine the information fromboth of these. While wavelet transforms are typically restricted toequally spaced observations an integer power of 2 in number, we show howto go beyond these constraints. We use our methods to construct ’patios‘for 21 important international commodity price series. These graph themagnitude of the variations in the series at different time scales forvarious subperiods of the full sample.