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Welfare, Welfarism, and Extrawelfarism

Decisions need to be made when there are at least two alternatives to choose from. Like other decision making, medical decision making is about making such choices between alternatives. To do so in a rational, systematic, and optimal way, a decision-making framework must be developed, which stipulates how we should evaluate the different options. This first of all requires a definition of what exactly it is that we are seeking to improve by making optimal decisions, that is, the underlying goal of our decisions, and what it is that will be lost if we fail to do so. In economics, this underlying maximand has normally been labeled welfare, hence the term welfare economics. In essence, welfare economics is concerned with defining optimal allocations of scarce resources, where optimality is defined by the allocation of resources that maximizes (social) welfare. A dominant coherent normative framework has been developed to judge whether changes from state of the world A to B would improve welfare, either for an individual or a society.

Welfare

If welfare is the appropriate maximand of individuals and societies, in its most comprehensive form, it needs to represent some ultimate objective of individuals and societies. It should be an overall representation (index) of well-being of individuals or societies, in which all relevant underlying components of welfare are embraced. In this case, attaining higher levels of welfare is equivalent to saying that the involved individual or society is better off. Note that this is also possible when some underlying components of welfare decrease while others improve, as long as the latter compensate, in an acceptable way, for the former. Welfare is therefore also the sphere in which changes in individual underlying components of welfare can be traded off. Sometimes, it has been suggested that the components of welfare would be limited to goods and services only, and a few economists have even equated welfare, at either the individual or the societal level, with income or wealth in applied work. This, however, seems unnecessarily restrictive. Rather, the components of welfare can be diverse and may include aspects such as friendship, leisure, and marriage. For instance, an individual may trade off a loss of leisure against a gain of income and decide to be better off, that is, improve his or her welfare, by working more. A society may trade off the loss of an ancient forest against reduced travel time and decide to be worse off, that is, reduce welfare, when sacrificing the forest for more roads. It is especially such tradeoffs of losses and gains that form the heart of welfare economics, as typically observed in economic evaluations.

Utility

In economics, a commonly used term for welfare is utility. Its meaning has always been ambiguous. In the days of Jeremy Bentham and John Stuart Mill, utility was often equated with happiness (as in the utilitarian motto “the greatest happiness for the greatest number”) or with life satisfaction, although this equation always has been the topic of debate. The interpretation of utility as happiness or life satisfaction appears to become more popular again more recently, also in applied economics. However, the dominant view on utility moved away from this interpretation, also due to the problems of measurability and interpersonal comparability of utility (discussed below). The focus on the emotional evaluation of states of the world was rejected and utility is now usually taken to represent simply preference orderings or an index of choice. Within health economics and medical decision making, the term utility is indeed often used to refer to preference weights for different health states used in quality-adjusted life years (QALYs) calculations.

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