Baltagi, Badi H.; Jung, Byoung Cheol; Song, Seuck Heun - Center for Policy Research, Maxwell School - 2008
, and derives a joint LM test for homoskedasticity and no first order serial correlation. The restricted model is the … standard random individual error component model. It also derives a conditional LM test for homoskedasticity given serial … correlation, as well as a conditional LM test for no first order serial correlation given heteroskedasticity, all in the context …