Hospital Cost Analysis provides an overview of theoretical developments in the economic analysis of production and costs in the multiproduct firm, and discusses these developments. Following a lucid explanation of the concepts of jointness, input/output separability and returns to scale, a detailed discussion of the concept measurement and classification of hospital output is provided. A fundamental dilemma confronting economists interested in estimating hospital cost functions is highlighted, viz. the trade-off between flexibility in functional form and homogeneity within hospital output categories. Empirical results on the effects of case mix, scale and utilisation, public/private ownership, and the centralised administration of hospital systems on hospital costs are presented.