TITLE:
High Moments Jarque-Bera Tests for Arbitrary Distribution Functions
AUTHORS:
Gane Samb Lo, Oumar Thiam, Mohamed Cheikh Haidara
KEYWORDS:
Asymptotic Distribution, Asymptotic Statistical Tests, Normality Tests, Functional Empirical Processes
JOURNAL NAME:
Applied Mathematics,
Vol.6 No.4,
April
28,
2015
ABSTRACT: The Jarque-Bera’s fitting test for normality is a celebrated and powerful one. In this paper, we consider general Jarque-Bera tests for any distribution function (df) having at least 4k finite moments for k ≥ 2. The tests use as many moments as possible whereas the JB classical test is supposed to test only skewness and kurtosis for normal variates. But our results unveil the relations between the coeffients in the JB classical test and the moments, showing that it really depends on the first eight moments. This is a new explanation for the powerfulness of such tests. General Chi-square tests for an arbitrary model, not only normal, are also derived. We make use of the modern functional empirical processes approach that makes it easier to handle statistics based on the high moments and allows the generalization of the JB test both in the number of involved moments and in the underlying distribution. Simulation studies are provided and comparison cases with the Kolmogorov-Smirnov’s tests and the classical JB test are given.