Abstract
ABSTRACTThis paper discusses the detailed performance of an iterative plug-in (IPI) bandwidth selector for estimating the diurnal duration pattern in a Semi-ACD (semiparametric autoregressive conditional duration) model. For this purpose a large simulation study was carried out. The effects of different factors, which affect the selected bandwidth are discussed in detail. The simulated results and data examples show that the proposed IPI algorithm works very well in practice and that the Semi-ACD model in general is clearly superior to the parametric ACD model, if there is a deterministic trend in the duration data. It is also shown that the bandwidth selection, and the estimation of the diurnal pattern and the model parameters will all be clearly improved, if the sample size is enlarged. According to the goodness-of-fit of the estimated diurnal pattern, a best combination of the above-mentioned factors is found. Moreover, a comparative study shows that our proposal usually outperforms the commonly used cubic spline.
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