Ansink, E. and Weikard, H.P. (2025). Agreeing on public goods or bads Journal of Environmental Economics and Management, 130:1--12.

Without regulation or agreement, public goods are underprovided and public bads are overprovided. Both problems are usually seen as flip sides of the same coin. In this paper we examine a situation where a public good is good for some agents but bad for others, depending on the provisioning level of the good. We allow agents to form a coalition to coordinate this provision. Our results show that, compared to games with only goods (or only bads), larger coalitions form in equilibrium. For a game specification with quadratic benefit- and cost functions, we find the grand coalition to be stable except when agents have identical or almost identical characteristics. The primary driver of coalition stability is the avoidance of a wasteful contest between agents pulling the provision level in opposing directions. In equilibrium, such wasteful contests are confined to a narrow range within the parameter space. This result connects the literatures on public goods and contests.