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Testing for linearity in Markov switching models: a bootstrap approach

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Abstract

Testing for linearity in the context of Markov switching models is complicated because standard regularity conditions for likelihood based inference are violated. In particular, under the null hypothesis of linearity, some parameters are not identified and scores are identically zero. Thus, the asymptotic distribution of the relevant test statistic does not possess the standard χ 2-distribution. A bootstrap resampling scheme to approximate the distribution of the relevant test statistic under the null of linearity is proposed. The procedure is relatively easy to program and computation requirements are reasonable. The performance of the bootstrap-based test is investigated by means of Monte Carlo simulations. Results show that this test works well and outperforms the Hansen test and the Carrasco et al. test.

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  1. Prometeia, Via G. Marconi 43, 40122, Bologna, Italy

    Silvestro Di Sanzo

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  1. Silvestro Di Sanzo
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Correspondence to Silvestro Di Sanzo.

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Di Sanzo, S. Testing for linearity in Markov switching models: a bootstrap approach. Stat Methods Appl 18, 153–168 (2009). https://doi.org/10.1007/s10260-007-0080-6

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