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Investigating Nonlinearity: A Note on the Implementation of Hamilton's Methodology

Derek Bond (), M. Harrison and Edward O'Brien

Economic Papers from Trinity College Dublin, Economics Department

Abstract: In this paper we give an account of the new approach to nonlinear econometric modelling proposed by Hamilton (2001) and briefly describe some of the methods of nonlinear optimization that may be used in the Gauss computer program provided by Hamilton for the implementation of his methodology. The performance of this program is investigated using data relating to Hamilton's example concerning the US Phillips curve, two versions of the Gauss software and a range of alternative numerical optimization options and values for the important Gauss parameter _oprteps. Finally, the effects of changes in the sample data on the results produced by Hamilton's procedure are explored. The results presented suggest some clear conclusions, which will be of value to those contemplating working with Hamilton's new method.

Date: 2003
New Economics Papers: this item is included in nep-ecm and nep-ets
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