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From preference to happiness: Towards a more complete welfare economics

Yew-Kwang Ng ()

Social Choice and Welfare, 2003, vol. 20, issue 2, pages 307-350

Abstract: Welfare economics is incomplete as it analyzes preference without going on to analyze welfare (or happiness) which is the ultimate objective. Preference and welfare may differ due to imperfect knowledge, imperfect rationality, and/or a concern for the welfare of others (non-affective altruism). Imperfection in knowledge and rationality has a biological basis and the resulting accumulation instinct amplifies with advertising-fostered consumerism to result in a systematic materialistic bias, as supported by recent evidence on happiness and quality of life. Such a bias, in combination with relative-income effects, environmental disruption effects, and over-estimation of the excess burden of taxation, results in the over-spending on private consumption and under-provision of public goods, and may make economic growth welfare-reducing. A cost-benefit analysis aiming even just at preference maximization should offset the excess burden of financing for public projects by the indirect effect through the relative-income effect and by the environmental disruption effect. A cost-benefit analysis aiming at welfare maximization should, in addition, adjust the marginal consumption benefits of public projects upward by a proportion determined by the proportionate excess of marginal utility over marginal welfare of consumption. The environmental disruption effects have also to be similarly adjusted upward. However, the productive contributions of public projects should not be so adjusted. Welfare economics has achieved much, though still with long-standing weaknesses (e.g., the inability to make non-Pareto comparisons due to the unwillingness or difficulties in making interpersonal comparisons of cardinal utilities). It is not the intention of this paper either to survey the achievements or to remedy the weaknesses. Rather, it is argued that welfare economics is too narrow in focus and should be expanded in a number of aspects to make the analysis more complete and hence more useful. Some of the aspects discussed below have long been known but largely ignored in welfare economic analysis. Some are less well known and controversial points which are nevertheless important for welfare. Copyright Springer-Verlag Berlin Heidelberg 2003

Date: 2003
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