1. Health Committee. Priority setting in the NHS: the NHS drugs budget. Health Committee second report volume 1. London: HMSO, 1994.
2. A demand model for prescriptions. Unpublished paper. ISER, University of York, 1977.
3. The effects of price changes on the demand for and cost of pharmaceutical prescriptions. Paper presented to the International Conference on Health Economics Analysis of Medical Prescriptions. Lille, France, Sept. 14–16, 1983.