The disability-adjusted life year (DALY) has emerged in the internatio
nal health policy lexicon as a new measure of the 'burden of disease'.
We argue that the conceptual and technical basis for DALYs is flawed,
and its assumptions and value judgements are open to serious question
. In particular, the implications of age-weighting and discounting are
found to be unacceptable. Moreover, the proponents of DALYs do not di
stinguish between the exercises of measuring the burden of disease and
of allocating resources. But the appropriate information sets for the
two exercises are quite different. Allocating resources by aggregate
DALY-minimization is shown to be inequitable. (C) 1997 Elsevier Scienc
e B.V.