Except for a few NHS services, the allocation of resources depends on administrative-cummedical decision-making. At one level the Scottish Home and Health Department allocates funds between the fifteen health boards, at another level clinicians allocate resources between patients. We examine experience at a level intermediate between these two, and focus on the provision of two services--diagnostic radiology and ECG--at health centres. A benefit: cost framework is used to test three hypotheses about how the two services have been allocated. The three hypotheses relate to the benefits from provision and are characterised as 'medical excellence', 'equity' and 'market' orientated. Data on health centre list size and distance to alternative provision are used to test the hypotheses. The conclusions are as follows. The equity and market models are equally valid descriptions for ECG, a service provided by general practitioners. A combination of the equity and/or market model with the medical model is a valid description for diagnostic radiology, a service provided by health boards and the Scottish Home and Health Department.