1. The relationship between volume and the scope of activity and hospital costs. Part II in NHS Centre for Reviews and Dissemination, Concentration and choice in the provision of hospital services, CRD Report 8, University of York, 1997.
2. Economies of scale and scope. In: and (eds.), Concentration and choice in healthcare markets. London: FT Healthcare, October 1997, Chapter 2.
3. Volume of clinical activity in hospitals and healthcare outcomes, costs, and patient access.