Publicado

2017-07-01

Local dependence in bivariate copulae with Beta marginals

Dependencia local en copulas bivariadas con marginales Beta

DOI:

https://doi.org/10.15446/rce.v40n2.59404

Palabras clave:

Beta distribution, local dependence function, copula, bivariate densities (en)
Asociación, distribución Beta, cópula, correlación, función de distribución bivariada (es)

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Autores/as

  • Eirini Koutoumanou Institute of Child Health, University College London Senior Teaching Fellow
  • Angie Wade Institute of Child Health, University College London Professor
  • Mario Cortina-Borja University College London https://orcid.org/0000-0003-0627-2624

The local dependence function (LDF) describes changes in the correlation structure of continuous bivariate random variables along their range. Bivariate density functions with Beta marginals can be used to model jointly a wide variety of data with bounded outcomes in the (0,1) range, e.g. proportions. In this paper we obtain expressions for the LDF of bivariate densities constructed using three different copula models (Frank, Gumbel and Joe)  with Beta marginal distributions, present examples for each,  and discuss an application of these models to analyse data collected in  a study of marks obtained on a statistics exam by postgraduate students.

La función de dependencia local (FDL) describe cambios en la estructura
de la correlación entre dos variables aleatorias continuas sobre su recorrido conjunto. Funciones bivariadas de densidad de probabilidad con densidades marginales Beta pueden utilizarse para modelar conjuntamente una amplia variedad de variables respuesta acotadas en el intervalo (0,1), por ejemplo proporciones.

En este artículo obtenemos expresiones para la FDL de densidades bivariadas utilizando tres modelos de cópulas (Frank, Gumbel y Joe) con densidades marginales Beta, presentamos ejemplos para cada una de estas funciones, y discutimos una aplicación de estos modelos al análisis de datos recolectados en un estudio de calificaciones para un examen de estadística aplicado a estudiantes de postgrado.

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Cómo citar

APA

Koutoumanou, E., Wade, A. y Cortina-Borja, M. (2017). Local dependence in bivariate copulae with Beta marginals. Revista Colombiana de Estadística, 40(2), 281–296. https://doi.org/10.15446/rce.v40n2.59404

ACM

[1]
Koutoumanou, E., Wade, A. y Cortina-Borja, M. 2017. Local dependence in bivariate copulae with Beta marginals. Revista Colombiana de Estadística. 40, 2 (jul. 2017), 281–296. DOI:https://doi.org/10.15446/rce.v40n2.59404.

ACS

(1)
Koutoumanou, E.; Wade, A.; Cortina-Borja, M. Local dependence in bivariate copulae with Beta marginals. Rev. colomb. estad. 2017, 40, 281-296.

ABNT

KOUTOUMANOU, E.; WADE, A.; CORTINA-BORJA, M. Local dependence in bivariate copulae with Beta marginals. Revista Colombiana de Estadística, [S. l.], v. 40, n. 2, p. 281–296, 2017. DOI: 10.15446/rce.v40n2.59404. Disponível em: https://revistas.unal.edu.co/index.php/estad/article/view/59404. Acesso em: 15 abr. 2025.

Chicago

Koutoumanou, Eirini, Angie Wade, y Mario Cortina-Borja. 2017. «Local dependence in bivariate copulae with Beta marginals». Revista Colombiana De Estadística 40 (2):281-96. https://doi.org/10.15446/rce.v40n2.59404.

Harvard

Koutoumanou, E., Wade, A. y Cortina-Borja, M. (2017) «Local dependence in bivariate copulae with Beta marginals», Revista Colombiana de Estadística, 40(2), pp. 281–296. doi: 10.15446/rce.v40n2.59404.

IEEE

[1]
E. Koutoumanou, A. Wade, y M. Cortina-Borja, «Local dependence in bivariate copulae with Beta marginals», Rev. colomb. estad., vol. 40, n.º 2, pp. 281–296, jul. 2017.

MLA

Koutoumanou, E., A. Wade, y M. Cortina-Borja. «Local dependence in bivariate copulae with Beta marginals». Revista Colombiana de Estadística, vol. 40, n.º 2, julio de 2017, pp. 281-96, doi:10.15446/rce.v40n2.59404.

Turabian

Koutoumanou, Eirini, Angie Wade, y Mario Cortina-Borja. «Local dependence in bivariate copulae with Beta marginals». Revista Colombiana de Estadística 40, no. 2 (julio 1, 2017): 281–296. Accedido abril 15, 2025. https://revistas.unal.edu.co/index.php/estad/article/view/59404.

Vancouver

1.
Koutoumanou E, Wade A, Cortina-Borja M. Local dependence in bivariate copulae with Beta marginals. Rev. colomb. estad. [Internet]. 1 de julio de 2017 [citado 15 de abril de 2025];40(2):281-96. Disponible en: https://revistas.unal.edu.co/index.php/estad/article/view/59404

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CrossRef Cited-by

CrossRef citations1

1. Susanne Trick, Constantin A. Rothkopf, Frank Jäkel. (2023). Parameter estimation for a bivariate beta distribution with arbitrary beta marginals and positive correlation. METRON, 81(2), p.163. https://doi.org/10.1007/s40300-023-00247-2.

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