This article asks whether firms should contribute to the costs of procreation and parenthood. We explore two sets of arguments. First, we ask what the principle of fair play – central in parental justice debates – implies. We argue that if one defends a pro-sharing view, firms are required to shoulder part of the costs of procreation and parenthood. Second, we turn to the principle of fair equality of opportunity. We argue that compensating firms for costs they incur because their employees decide to procreate or parent may undermine some of the incentives leading to (statistical) discrimination in the workplace.

Lockean approaches to property take it that persons can unilaterally acquire private ownership over hitherto unowned resources. Such natural law accounts of property rights are often thought to be of limited use when dealing with the complexities of natural resource use outside of the paradigm of private ownership of land for agricultural or residential development. The tragedy of the commons has been shown to be anything but an inevitability, and yet Lockeanism seems to demand that even the most robust common property arrangements be converted to privatized units. This often motivates a move away from natural law in the moral analysis of property rights. I argue however that it is not the deontological nature of Lockean principles that are at fault, but rather the manner of their application. Lockean theory often exhibits a bias in favour of private property: assuming that only private property can protect one’s interest in autonomy, and therefore asserting that each individual has a power of private acquisition. Starting with a claim against interference however enables us to mould the appropriate property rights to each individual’s particular interest in autonomy. This sometimes leads to private ownership, but often leads to various forms of commons.

Forthright characterization of scientific uncertainty is important in principle and in practice. Nevertheless, economists and other researchers commonly report findings with incredible certitude, reporting point predictions and estimates. To motivate expression of incredible certitude, economists suggest that researchers respond to incentives that make the practice tempting. This temptation is the ‘lure’ of incredible certitude. I appraise some of the rationales that observers may have in mind when they state that incredible certitude responds to incentives. I conclude that scientific expression of incredible certitude at most has appeal in limited contexts. It should not be a general practice.

Should we allow grave harm to befall one individual so as to prevent minor harms befalling sufficiently many other individuals? This is a question of aggregation. Can many small harms ‘add up’, so that, collectively, they morally outweigh a greater harm? The ‘Close Enough View’ supports a moderate position: aggregation is permissible when, and only when, the conflicting harms are sufficiently similar, or ‘close enough’, to each other. This paper surveys a range of formally precise interpretations of this view, and reveals some of the problems they face. It also proposes a novel interpretation which avoids these problems.

Hobbes believed that the state of nature would be a war of all against all. Locke denied this, but acknowledged that in the absence of government, peace is insecure. In this paper, I analyse both accounts of the state of nature through the lens of classical and experimental game theory, drawing especially on evidence concerning the effects of punishment in public goods games. My analysis suggests that we need government not to keep wicked or relentlessly self-interested individuals in line, but rather to maintain peace among those who disagree about morality.

What do we owe participants in collective pension plans in terms of socially responsible investment (SRI)? This paper draws into question current conventional wisdom on SRI, which considers investor engagement a more effective strategy than divestment to change morally problematic corporate behaviour. More fundamentally, in light of reasonable disagreement about the objective of SRI, the paper argues that participants in collective pension plans are owed some kind of control over their investments. The final section considers four different institutional arrangements to respect this requirement in practice, ranging from democratic decision procedures to the availability of SRI alternatives.

The voting paradox occurs when a democratic society seeking to aggregate individual preferences into a social preference reaches an intransitive ordering. However it is not widely known that the paradox may also manifest for an individual aggregating over attributes of risky objects to form a preference over those objects. When this occurs, the relation ‘stochastically greater than’ is not always transitive and so transitivity need not hold between those objects. We discuss the impact of other decision paradoxes to address a series of philosophical and economic arguments against intransitive (cyclical) choice, before concluding that intransitive choices can be justified.

This paper proposes a new interpretation of non-cooperative games that shows why the unilateralism of best-reply reasoning fails to capture the mutuality of strategic interdependence. Drawing on an intersubjective approach to theorizing individual agency in shared context, including a non-individualistic model of common belief without infinite regress, the paper develops a general model of a 2 × 2 simultaneous one-shot non-cooperative game and applies it to games including Hi-Lo, Stag Hunt, Prisoners’ Dilemma, Chicken, BoS and Matching Pennies. Results include High as the rational choice in Hi-Lo, and Cooperate as a possible rational choice in the Prisoners’ Dilemma.

Critical-Range Utilitarianism is a variant of Total Utilitarianism which can avoid both the Repugnant Conclusion and the Sadistic Conclusion in population ethics. Yet Standard Critical-Range Utilitarianism entails the Weak Sadistic Conclusion, that is, it entails that each population consisting of lives at a bad well-being level is not worse than some population consisting of lives at a good well-being level. In this paper, I defend a version of Critical-Range Utilitarianism which does not entail the Weak Sadistic Conclusion. This is made possible by what I call ‘undistinguishedness’, a fourth category of absolute value in addition to goodness, badness, and neutrality.

This paper examines the perceptual and reasoning processes that underpin regularities in behaviour. A distinction is made between situations as they are, or as described by an omniscient external observer, and situations as agents see or frame them. Different frames can stem from differences in culture, experience and personality, as well as from other context-specific factors. Drawing upon David Lewis’s Convention (1969), I show that consistency between reasoning and experience does not preclude individuals from understanding the same state of affairs differently, and that agents’ beliefs about others’ beliefs may well be wrong. As a result, cases may occur in which conventions are sustained by false but mutually consistent and self-confirming beliefs.

Markets allow for the processing of decentralized information through the price mechanism. But in addition, many markets rely on other mechanisms in markets, or non-market institutions, that provide and manage other forms of knowledge. Within national economies, these institutions form an ‘epistemic infrastructure’ for markets. In global markets, in contrast, this epistemic infrastructure is very patchy, undermining the preconditions for morally responsible agency. New technologies might help to improve the epistemic infrastructure of global markets, but they require conceptualizing knowledge not only as a tradable good, but also as a precondition of morally responsible agency.

The Levelling-Down Objection is a standard objection to monistic egalitarian theories where equality is the only thing that has intrinsic value. Most egalitarians, however, are value pluralists; they hold that, in addition to equality being intrinsically valuable, the egalitarian currency in which we are equal or unequal is also intrinsically valuable. In this paper, I argue that the Levelling-Down Objection still minimizes the weight that the intrinsic badness of inequality could have in the overall intrinsic evaluation of outcomes, given a certain way of measuring the badness of inequality, namely, the Additive Individual-Complaints Measure.

This paper investigates the relationship between economic theory and theories of justice in the design of public policy. In particular, it focuses on the role of mechanism design in policy contexts beset with issues of social, racial and distributive justice. Economists’ involvement in redesigning Boston’s algorithm for allocating K-12 students to public schools serves as an instructive case study. The paper draws on the distinction between ideal theory and non-ideal theory in political philosophy and the concept of performativity in economic sociology to argue that mechanism design can enact elaborate ideal theories of justice. A normative gap thus emerges between the goals of the policymakers and the objectives of economic designs. As a result, mechanism design may obstruct stakeholders’ avenues for normative criticism of public policies, and serve as a technology of depoliticization.

This paper introduces a condition for rational choice that states that accepting decision methods and normative theories that sometimes entail that the act of choosing a maximal alternative renders this alternative non-maximal is irrational. The paper illustrates how certain distributive theories that ascribe importance to what the status quo is violate this condition and argues that they thereby should be rejected.

No net loss approaches to environmental policy claim that policy should maintain aggregate levels of natural capital. Substitutability between natural assets allows losses in some assets to be compensated for by gains in others while maintaining overall levels of natural capital. This paper argues that significant goods that matter to people’s well-being will be lost through a policy of no net loss. The concepts of natural capital and ecosystem services that underpin the no net loss approach to environmental policy cannot capture important dimensions of value that are central to human well-being.

Population ethics is widely considered to be exceptionally important and exceptionally difficult. One key source of difficulty is the conflict between certain moral intuitions and analytical results identifying requirements for rational (in the sense of complete and transitive) social choice over possible populations. One prominent such intuition is the Asymmetry, which jointly proposes that the fact that a possible child’s quality of life would be bad is a normative reason not to create the child, but the fact that a child’s quality of life would be good is not a reason to create the child. This paper reports a set of questionnaire experiments about the Asymmetry in the spirit of economists’ empirical social choice. Few survey respondents show support for the Asymmetry; instead respondents report that expectations of a good quality of life are relevant. Each experiment shows evidence (among at least some participants) of dual-process moral reasoning, in which cognitive reflection is statistically associated with reporting expected good quality of life to be normatively relevant. The paper discusses possible implications of these results for the economics of population-sensitive social welfare and for the conflict between moral mathematics and population intuition.