How should we define the feasible set? Even when individuals agree on facts and values, as traditionally construed, different views on feasibility may suffice to produce very different policy conclusions. Focusing on the difficulties in the feasibility concept may help us resolve some policy disagreements, or at least identify the sources of those disagreements. Feasibility is most plausibly a matter of degree rather than of kind. Normative economic reasoning therefore faces a fuzzy social budget constraint. Iterative reasoning about feasibility and desirability may help us overcome these problems.

Which rules for aggregating judgments on logically connected propositions are manipulable and which not? In this paper, we introduce a preference-free concept of non-manipulability and contrast it with a preference-theoretic concept of strategy-proofness. We characterize all non-manipulable and all strategy-proof judgment aggregation rules and prove an impossibility theorem similar to the Gibbard--Satterthwaite theorem. We also discuss weaker forms of non-manipulability and strategy-proofness. Comparing two frequently discussed aggregation rules, we show that “conclusion-based voting” is less vulnerable to manipulation than “premise-based voting”, which is strategy-proof only for “reason-oriented” individuals. Surprisingly, for “outcome-oriented” individuals, the two rules are strategically equivalent, generating identical judgments in equilibrium. Our results introduce game-theoretic considerations into judgment aggregation and have implications for debates on deliberative democracy.

Recent theories of negative freedom see it as a value-neutral concept; the definition of freedom should not be in terms of specific moral values. Specifically, preferences or desires do not enter into the definition of freedom. If preferences should so enter then Berlin's problem that a person may enhance their freedom by changing their preferences emerges. This paper demonstrates that such a preference-free conception brings its own counter-intuitive problems. It concludes that these problems might be avoided if the description of the constraints which specify an agent's lack of freedom include the intentions of those who constrain the agents.

It has become accepted that social choice is impossible in the absence of interpersonal comparisons of well-being. This view is challenged here. Arrow obtained an impossibility theorem only by making unreasonable demands on social choice functions. With reasonable requirements, one can get very attractive possibilities and derive social preferences on the basis of non-comparable individual preferences. This new approach makes it possible to design optimal second-best institutions inspired by principles of fairness, while traditionally the analysis of optimal second-best institutions was thought to require interpersonal comparisons of well-being. In particular, this approach turns out to be especially suitable for the application of recent philosophical theories of justice formulated in terms of fairness, such as equality of resources.

Cost–benefit analysis (CBA) is much more philosophically interesting than has in general been recognized. Since it is the only well-developed form of applied consequentialism, it is a testing-ground for consequentialism and for the counterfactual analysis that it requires. Ten classes of philosophical problems that affect the practical performance of cost–benefit analysis are investigated: topic selection, dependence on the decision perspective, dangers of super synopticism and undue centralization, prediction problems, the indeterminateness of our control over future decisions, the need to exclude certain consequences for moral reasons, bias in the delimitation of consequences, incommensurability of consequences, difficulties in defending the essential requirement of transferability across contexts, and the normatively questionable but equally essential assumption of interpersonal compensability.

List and Pettit have stated an impossibility theorem about the aggregation of individual opinion states. Building on recent work on the lottery paradox, this paper offers a variation on that result. The present result places different constraints on the voting agenda and the domain of profiles, but it covers a larger class of voting rules, which need not satisfy the proposition-wise independence of votes.

Fascination with the Coase Theorem arises over its apparently unassailable counterintuitive conclusion that the imposition of legal liability has no effect on which of two competing uses of land prevails, and also over the general difficulty in tying down an unqualified statement of the theorem. Instead of entering the debate over what exactly the theorem holds, this article suggests that the core of Coase's reasoning is flawed and to the extent that any version of the theorem relies upon this reasoning it can be disproved. The article commences by modelling the nature of the counter-intuitive thrust to the Coase Theorem, which is used to trace the development of Coase's reasoning, and ultimately to expose the flaw it contains. The heart of the article comprises the allegation of an error made by Coase when he transferred his core argument to the context of economic rents. Ancillary observations are made on the relationship between the Coasean analysis of characteristically legal problems and the conditions of general market equilibrium, and the theoretical status of Law-and-Economics.

Roughly, according to conditional egalitarianism, equality is non-instrumentally valuable, but only if it benefits at least one individual. Some political theorists have argued that conditional egalitarianism has the important virtue that it allows egalitarians to avoid the so-called ‘levelling down’ objection. However, in the present article I argue that conditional egalitarianism does not offer the egalitarian a plausible escape route from this objection. First, I explain the levelling down objection and suggest some particular concerns from which it derives its force. Then I provide a more precise definition of conditional egalitarianism. Finally, I give two arguments against this principle. According to the first, it violates the transitivity of the betterness relation (or more specifically, ‘betterness with respect to equality’). According to the second, there is no plausible explanation of why equality must benefit at least one individual in order to be non-instrumentally valuable.

Numerous instruments have been developed to elicit numerical values that represent the strength of preference for different health states. However, relatively few studies have attempted to analyse the reasoning processes that people employ when they are asked to answer questions based on these elicitation methods. The lottery equivalents method is a preference elicitation instrument that has recently received some attention in the literature. This study attempts a qualitative analysis of the use of this instrument on a group of 25 relatively highly educated respondents. For each of three health states considered in the study, a substantial number of respondents refused to trade the chance of survival for a possible improvement in the health state. Therefore, many respondents violated an assumption that is necessary for the lottery equivalents instrument to generate cardinal health state values. These findings place a question mark against the usefulness of the lottery equivalents method, and add weight to the suspicion that ‘preferences’ are constructed according to how questions are framed.

Upon learning that John C. Harsanyi (1920–2000) was awarded the Bank of Sweden Prize in Economic Sciences in Memory of Alfred Nobel, in 1994, for his pioneering work in game theory, few economists probably questioned the appropriateness of that choice. The Budapest-born social scientist had already been recognized as a first-rank contributor to non-cooperative game theory for some time (see, e.g., Gul 1997). However, as many readers of this journal will be aware, Harsanyi first contributed to welfare economics, not game theory. More importantly, he was philosophically minded and accordingly has been “acknowledged as the most influential philosopher in economics” (Güth 1994: 252).1 This is of some significance since, before Harsanyi became acquainted with economics around 1950, his main interest was philosophy and, to a lesser extent, sociology and psychology. Rather than an economist with philosophical leanings, Harsanyi was actually a philosopher turned economist.

The incomparability of alternatives is thought to pose a problem for justified choice, particularly for proponents of comparativism – the view that comparative facts about alternatives determine what one rationally ought to choose. As a solution, it has been argued that alternatives judged incomparable by one of the three standard comparative relations, “better than,” “worse than,” and “equally good,” are comparable by some fourth relation, such as “roughly equal” or “on a par.” This solution, however, comes at what many would regard as too high a cost – namely, rejection of the transitivity of the relation “at least as good as.” In this paper, I argue that proponents of comparativism need not incur this cost. I defend the possibility of justified choice between incomparable alternatives on grounds that comparativists can accept. The possibility of incomparability has been met with resistance, in part because of the intuitive appeal of comparativism. By defending the possibility of justified choice between incomparable alternatives on grounds that comparativists can accept, this paper supports further inquiry into the subject of incomparability.

Conventional economic theory assumes that people care only about ultimate outcomes and are indifferent to the decision and allocation processes by which outcomes are brought about. Building on Sen (1997), I relax this assumption, and investigate the formal and philosophical issues that arise. I extend the formal apparatus of preference theory to analyse how processes may enter preferences, and investigate whether traditional invariance requirements like the Weak Axiom of Revealed Preference are still satisfied in this new setting. I show that it is, provided certain conditions of separability hold, and I discuss the plausibility of these conditions. Further, I argue that processes are often valued in a mode that diverges from the conventional modes of instrumental and intrinsic/independent valuation. I introduce the notion of dependent non-instrumental valuation, and show how processes could depend on their instrumental function for their value – making their value dependent – and yet derive their value from something else – making it non-instrumental. Dependent non-instrumental value, I argue, can be explained by symbolic and evidential relations between processes and outcomes.

Philosophical errors are errors of a very peculiar nature.

Obviously, errors occur in the different areas of science, as well as in everyday life. But these errors are sooner or later recognized and exposed, and – most importantly – once they are recognized and exposed, they are essentially rendered harmless, at least for those versed in the respective discipline. A false historical datum, an experimental error or a calculation mistake becomes indefensible as soon as it is noticed.

John Broome's ground-breaking Weighing Lives makes precise, and supplies arguments previously lacking for, several views which for centuries have been central to the utilitarian tradition. In gratitude for his enlightening arguments, I shall repay him in this paper by showing how he could make things easier for himself by denying neutrality and accepting hedonism.

The present note will be concerned only with Sir Partha Dasgupta's recent article in this journal (Dasgupta 2005). What is more, it will concentrate on those parts of the article which contain a serious misreading of Hilary Putnam's position on the entanglement of facts, theories and values. These philosophical matters can perhaps be clarified for economist readers (they should require no clarification for philosophers) by considering, to begin with, Dasgupta's interpretation of the Bergson–Samuelson position. What (Bergson) Burk (1938) and Samuelson (1947) were doing, according to Dasgupta, was to establish ‘the ethical foundations of the subject. . .over five decades ago’ (Dasgupta 2005: 221–2).2 Thus a major theme of the article is heard at once: economics is supposedly based on sound ethical foundations, and these can be traced (it is supposed) to specific work written long ago, and hence needing no augmentation. These ethical foundations, it is claimed, ‘are now regarded to be a settled matter’ (2005: 222).

In “Weighing Lives”, John Broome defends a very weak consequentialist account of the value of saving lives. This paper challenges the commitments of this kind of account and describes some reasons for saving lives that would appeal to a non-consequentialist.

John Broome's Weighing Lives provides a much-needed framework for the intriguing problems of population ethics. It is also an impressive attempt to find a workable solution to these problems. I am not sure that Broome has found the right solution, but I think he has done the ethics profession a tremendous service in tidying up the discussion. The framework he presents will make it possible for the participants in this debate to formulate their positions in a clear and precise manner. Even people who disagree with him will be helped by this framework, since they will now be able to show exactly where their views differ.