1. Britain's Relative Productivity Performance: Updates to 1999. Final Report to DTI/Treasury/ONS. NIESR: London, 2002.
2. The Theory of Environmental Policy, Chapter 17. Prentice Hall: Englewood Cliffs, NJ, 1975.
3. Department of Health, OPCS, HM Treasury. The Government's Expenditure Plans. HMSO: London, 1990-2001 (annual publication).
4. Productivity Change in Health Care
5. OECD. OECD Health Data, 2000.