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Title: A bimodal discrete shifted poisson distribution: a case study of tourists’ length of stay
Authors: Gómez Déniz, Emilio 
Pérez Rodríguez, Jorge Vicente 
Reyes, Jimmy
Gómez, Héctor W.
UNESCO Clasification: 530202 Modelos econométricos
531290 Economía sectorial: turismo
Keywords: Bimodality
Shifted Poisson distribution
Length of tourist stay
Issue Date: 2020
Project: Aportaciones A la Toma de Decisiones Bayesianas Óptimas: Aplicaciones Al Coste-Efectividad Con Datos Clínicos y Al Análisis de Riestos Con Datos Acturiales. 
Journal: Symmetry 
Abstract: Although the Poisson distribution is appropriate for modelling equi-dispersed distributions, it reflects bimodality less well. In this paper, we propose a distribution which is more suitable for the latter purpose. It can be fitted to both positively and negatively skewed data and appears to represent overdispersion phenomena correctly in count data models obtained using a Poisson distribution. Furthermore, the distribution can be normalised in terms of its mean value, and therefore covariates can be included. Our empirical results are based on tourists’ length of stay in the Canary Islands (Spain), a popular holiday destination. The study analyses data supplied by the Canary Islands Tourist Expenditure Survey. Our findings show that the model presented is valid and that the fit obtained is reasonably good.
ISSN: 2073-8994
DOI: 10.3390/sym12030442
Source: Symmetry [ISSN 2073-8994], v. 12(3), 442, (Marzo 2020)
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