Rosco, J. F.; Jones, M. C. and Pewsey, Arthur
Skew t distributions via the sinh-arcsinh transformation.
(Click here to request a copy from the OU Author.
A version of the sinh-arcsinh transformation is used to generate a skew extension of Student’s t distribution which provides an alternative to previously proposed skew t distributions. The basic properties of the resulting sinh-arcsinhed t family of distributions are presented, many of them effectively having the same level of complexity as their Student t counterparts. Quantile-based measures, which come to the fore due to the non-existence of moments, are readily available. The parameters of the distribution have clear interpretations. Limiting distributions as shape parameters tend to their extreme values are especially appealing. The family’s simplest sub-class is closely related to a sub-class of the LU family. Likelihood based inference is considered and applied in the analysis of heavy-tailed and skew data on fibre glass strengths. Comparisons are made throughout with two of the most popular existing competitors to this distribution: it scores very well relative to them on a number of tractability grounds.
||2010 Sociedad de Estadística e Investigación Operativa
||Junta de Extremadura (grant PRE08028), Junta de Extremadura (grant PRI08A094), Spanish Ministry of Science and Education (MTM2010-16845)
||Azzalini-type distributions; heavy tails; quantile-based measures; student’s t distribution; skewness; two-piece distributions
||Mathematics, Computing and Technology > Mathematics and Statistics
||07 Dec 2011 17:05
||30 Nov 2012 10:44
Actions (login may be required)