Title : ( Nonparametric tests of independence using copula-based Renyi and Tsallis divergence measures )
Authors: morteza mohammadi , Mahdi Emadi ,Abstract
We introduce new nonparametric independence tests based on Renyi and Tsallis divergence measures and copula density function. These tests reduce the complexity of calculations because they only depend on the copula density. The copula density estimated using the local likelihood probit-transformation method is appropriate for the identification of independence. Also, we present the consistency of the copula-based Renyi and Tsallis divergence measures estimators that are considered as test statistics. A simulation study is provided to compare the empirical power of these new tests with the independence test based on the empirical copula. The simulation results show that the suggested tests outperform in weak dependency. Finally, an application in hydrology is presented.
Keywords
, Independence test, Renyi divergence, Tsallis divergence, Copula density, Probit-transformation.@article{paperid:1092499,
author = {Morteza Mohammadi and Emadi, Mahdi},
title = {Nonparametric tests of independence using copula-based Renyi and Tsallis divergence measures},
journal = {Statistics, Optimization and Information Computing},
year = {2023},
volume = {11},
number = {4},
month = {August},
issn = {2311-004X},
pages = {949--962},
numpages = {13},
keywords = {Independence test; Renyi divergence; Tsallis divergence; Copula density; Probit-transformation.},
}
%0 Journal Article
%T Nonparametric tests of independence using copula-based Renyi and Tsallis divergence measures
%A Morteza Mohammadi
%A Emadi, Mahdi
%J Statistics, Optimization and Information Computing
%@ 2311-004X
%D 2023