They remark that the main impact of using the different samples is on the estimated impact of factors that vary with calendar time. Estimates are more imprecise with the smaller-sized samples. However, they are rarely applied by researchers fitting DREP models to SA histories. The only existing applications are Hansen, Lofstrom, Liu, and Zhang (2014) and Konigs (2013a), likely because most commonly-available software for fitting DREP models does not allow weights.