A comparison of hospital scale effects in short-run and long-run cost functions
利用91家希腊公立医院数据，比较长期与短期成本函数估计的规模经济，发现长期模型可能误导政策，希腊公立医院呈现恒定规模报酬。
Numerous estimates of economies of scale in the hospital setting have been obtained since the early 1980s from both flexible long-run and short-run cost functions. Although the theoretical superiority of the latter approach is widely recognized, it has been previously suggested that the two cost specifications yield quite similar econometric findings regarding scale effects. This paper utilizes a new data set consisting of 91 Greek NHS hospitals in order to empirically examine this proposition by comparing economies of scale estimates derived from both translog total and variable cost functions. The results indicate that the use of long-run equations might seriously mislead policy makers and that constant returns to scale prevail in Greek public hospitals.