We examine the time series properties of medical net discount rates based on five different medical consumer price indices, namely, medical care, medical services, medical care commodities, physician's services, and prescription drugs & medical supplies that were first analyzed by Ewing, Piette,...

Despite discussions about the relationship between returns to scale and economies of scale under assumptions of constant and nonconstant input prices, mistakes continue to be made in textbooks on these issues. This article demonstrates the pointwise relation between returns to scale and...