Crucial to the analysis in this paper is the Coasian insight that external costs result from conflicting uses of scarce resources and that responsibility for these costs should not be attributed exclusively to polluters as required by the polluter pays principle (PPP). The paper argues that the...

Pigou (1920) advocated for taxes, set equal to marginal damages, on goods produced and consumed that involve negative externalities. Samuelson (1954) laid out the conditions for optimal pure public goods provision, but noted that free-riding (the “demand revelation” problem) was likely to...

Economists typically locate the origins of the theory of externalities in A.C. Pigou's The Economics of Welfare (1920, 1932), where Pigou suggested that activities which generate uncompensated benefits or costs—e.g., pollution, lighthouses, scientific research—represent instances of market...

GoBs are goods for which agents have non-monotonic preferences: more is beneficial only up to an ideal level, beyond which additional quantities become undesirable. We analyze public GoBs (non-excludable and non-rival) through a theoretical framework applicable to diverse contexts such as solar...

Social preferences facilitate the internalization of health externalities, for example by reducing mobility during a pandemic. We test this hypothesis using mobility data from 258 cities worldwide alongside experimentally validated measures of social preferences. Controlling for time-varying...

This paper studies the designs of optimal tax programs in OLG economies when first, consumption of one household lowers (status) utility of others, and second, consumption harms the environment. Status seeking raises optimal consumption tax rates, and lowers optimal tax rates on capital income

From the perspective of competitors, competition may be modeled as a prisoner’s dilemma. Setting the monopoly price is cooperation, undercutting is defection. Jointly, competitors are better off if both are faithful to a cartel. Individually, profit is highest if only the competitor(s) is...

Public good provision is often local and also affects bystanders. Is provision harder if contributions harm bystanders, and is provision easier if outsiders gain a windfall profit? In an experiment we observe that both positive and negative externalities reduce provision levels whenever actors...

From the perspective of competitors, competition may be modeled as a prisoner's dilemma. Setting the monopoly price is cooperation, undercutting is defection. Jointly, competitors are better off if both are faithful to a cartel. Individually, profit is highest if only the competitor(s) is (are)...

Providing public goods is hard, because providers are best off free-riding. Is it even harder if one group's public good is a public bad for another group or, conversely, gives the latter a windfall profit? We experimentally study public goods provision embedded in a social context and find that...