Giles (2007) presents a summary of the debate that began as soon as Burnham et al. (2006) published their Iraq Mortality Survey (IMS) results in the British journal The Lancet. His article starts: ...
A reasonably broad class of models for analyzing two-stage samples is considered. For models in this class, ordinary least squares (OLS) estimates are best linear unbiased estimates (BLUE's) and a ...