Dolan, Paul; Shaw, Rebecca; Tsuchiya, Aki; Williams, Alan - In: Health Economics 14 (2005) 2, pp. 197-208
In cost-utility analysis, the numbers of quality-adjusted life years (QALYs) gained are aggregated according to the sum-ranking (or QALY maximisation) rule. This requires that the social value from health improvements is a simple product of gains in quality of life, length of life and the number...