APPLYING BETA‐TYPE SIZE DISTRIBUTIONS TO HEALTHCARE COST REGRESSIONS
用广义贝塔分布拟合英国医院住院成本数据，通过准实验设计比较该分布与其嵌套和极限情况，发现贝塔第二类分布和广义伽马分布表现更好，但广义贝塔分布可作为选择竞争性参数分布的工具。
SUMMARY This paper extends the literature on modelling healthcare cost data by applying the generalised beta of the second kind (GB2) distribution to English hospital inpatient cost data. A quasi‐experimental design, estimating models on a sub‐population of the data and evaluating performance on another sub‐population, is used to compare this distribution with its nested and limiting cases. While for these data the beta of the second kind (B2) distribution and generalised gamma (GG) distribution outperform the GB2, our results illustrate that the GB2 can be used as a device for choosing among competing parametric distributions for healthcare cost data. Copyright © 2013 John Wiley & Sons, Ltd.