Testing Methods of Heteroscedasticity in Regression Models

Athough the existence of heteroscedasticity does not destroy the unbiasedness of the OLS estimators,the variances become larger.Thus,it makes the heteroscedasticity unreliable.Thus,it is of great significance to choose the proper testingmethods of heteroscedasticity.In this article,we summarize and evaluate several methods that are often utilized to test heteroscedasticity in detail,and discuss advantages and defects of these methods.