The expansive learning curve literature in operations management has established how various facets of prior experience improve average performance. In this paper, we explore increased cumulative affects performance variability or consistency. We use a two-stage estimation method heteroskedastic model to examine the relationship between and among paramedics at London Ambulance Service. find tha...

 In this paper, we study stochastic comparisons of order statistics of independent random variables with proportional hazard rates, using the notion of variance majorization.

Antigenic variance may be defined as phenotypic expressions that are due to slight differences in gene sequences coding for viral proteins with antigenic reactivity (CALISHER 1988). Evidence for antigenic variance due to mutations and reassortment in the Bunyaviridae family is great and has been obtained by several different approaches. The main intent of this review, however, is not to discuss...