This paper explores the spatial equilibrium patterns of land conservation that derive from a game between land conservation agents who provide public goods. The shape of the conservation benefit function determines whether one agent's conservation crowds in/out conservation by the other agent....

A quarter of all species around the globe are threatened with extinction; this article reviews research in economics on how best to counter those threats. Normative research has developed useful tools for cost-effectively choosing areas of habitat to protect. Such work has also designed...