The hypothesis of structural stability that the regression coefficients do not change over time is central to all applications of linear regression models. It is rather surprising that existing theory as well as practice focuses on testing for structural change under homoskedasticity – that...

The hypothesis of structural stability that the regression coefficients do not change over time is central to all applications of linear regression models. It is rather surprising that existing theory as well as practice focuses on testing for structural change under homoskedasticity – that...

Analytic evaluation of heteroskedasticity consistent covariance matrix estimates (HCCME) is difficult because of the complexity of the formulae currently available. We obtain new analytic formulae for the bias of a class of estimators of the covariance matrix of OLS in a standard linear...

The 60th anniversary of China-Pakistan relations was celebrated in 2011. Pakistan was the third non-communist and the first Muslim country to recognize China in 1950. The diplomatic relations between China and Pakistan were established in May 1951.The friendship between China and Pakistan is all...