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Threshold quantile autoregressive models

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  • Galvao Jr, A. F.
  • Montes-Rojas, G.
  • Olmo, J.

Abstract

We study in this article threshold quantile autoregressive processes. In particular we propose estimation and inference of the parameters in nonlinear quantile processes when the threshold parameter defining nonlinearities is known for each quantile, and also when the parameter vector is estimated consistently. We derive the asymptotic properties of the nonlinear threshold quantile autoregressive estimator. In addition, we develop hypothesis tests for detecting threshold nonlinearities in the quantile process when the threshold parameter vector is not identified under the null hypothesis. In this case we propose to approximate the asymptotic distribution of the composite test using a p-value transformation. This test contributes to the literature on nonlinearity tests by extending Hansen’s (Econometrica 64, 1996, pp.413-430) methodology for the conditional mean process to the entire quantile process. We apply the proposed methodology to model the dynamics of US unemployment growth after the Second World War. The results show evidence of important heterogeneity associated with unemployment, and strong asymmetric persistence on unemployment growth.

Suggested Citation

  • Galvao Jr, A. F. & Montes-Rojas, G. & Olmo, J., 2009. "Threshold quantile autoregressive models," Working Papers 09/05, Department of Economics, City University London.
    • Handle: RePEc:cty:dpaper:09/05
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    File URL: https://openaccess.city.ac.uk/id/eprint/1498/1/Threshold_Quantile_Autoregressive_Models.pdf
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    References listed on IDEAS

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    Cited by:

    1. Galvao, Antonio F. & Montes-Rojas, Gabriel & Olmo, Jose, 2009. "Quantile Threshold Effects in the Dynamics of the Dollar/Pound Exchange Rate," The Journal of Economic Asymmetries, Elsevier, vol. 6(2), pages 69-82.

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