Research Hub

대학 자원

대학 인프라와 자원을 공유해 공동 연구와 기술 활용을 지원합니다.

Loading...

논문 리스트

2018
Construction of bivariate asymmetric copulas Construction of bivariate asymmetric copulas
한국통계학회
논문정보
Publisher
Communications for Statistical Applications and Methods
Issue Date
2018-03-31
Keywords
-
Citation
-
Source
-
Journal Title
-
Volume
25
Number
2
Start Page
217
End Page
234
DOI
ISSN
22877843
Abstract
Copulas are a tool for constructing multivariate distributions and formalizing the dependence structure between random variables. From copula literature review, there are a few asymmetric copulas available so far while data collected from the real world often exhibit asymmetric nature. This necessitates developing asymmetric copulas. In this study, we discuss a method to construct a new class of bivariate asymmetric copulas based on products of symmetric (sometimes asymmetric) copulas with powered arguments in order to determine if the proposed construction can offer an added value for modeling asymmetric bivariate data. With these newly constructed copulas, we investigate dependence properties and measure of association between random variables. In addition, the test of symmetry of data and the estimation of hyper-parameters by the maximum likelihood method are discussed. With two real example such as car rental data and economic indicators data, we perform the goodness-of-fit test of our proposed asymmetric copulas. For these data, some of the proposed models turned out to be successful whereas the existing copulas were mostly unsuccessful. The method of presented here can be useful in fields such as finance, climate and social science.

저자 정보

이름 소속
등록된 데이터가 없습니다.