Previous research proposes that human beings are motivated to protect endangered species for various reasons: consumptive use value, non-consumptive use value, non-use value, and intrinsic value. However, it has been difficult to tease apart these values at the behavioral level. Using an...

Economic evaluation of climate policy traditionally treats uncertainty by appealing to expected utility theory. Yet our knowledge of the impacts of climate policy may not be of sufficient quality to justify probabilistic beliefs. In such circumstances, it has been argued that the axioms of...

Intertemporal conflicts occur when a group of agents with heterogeneous time preferences must make a collective decision about how to manage a common asset. How should this be done? We examine two methods � an `Economics� approach that seeks to implement efficient allocations, and a...

The actions of different agents sometimes reinforce each other. Examples are network effects and the threshold models used by sociologists as well as (Harvey) Leibenstein's "bandwagon effects." We model such situations as a game with increasing differences, and show that tipping of equilibria,...

I present a non-technical high-level review the concept of sustainability and the various approaches to quantifying it.

Green growth is about making growth processes resource-efficient, cleaner and more resilient without necessarily slowing them. This paper aims at clarifying these concepts in an analytical framework and at proposing foundations for green growth. The green growth approach proposed here is based...

Uncertainty is intrinsic to climate change: we know that the climate is changing, but not precisely how fast or in what ways. Nor do we understand fully the social and economic consequences of these changes, or the options that will be available for reducing climate change. Furthermore the...

A group of time consistent agents has access to a common productive resource stock whose output provides their consumption needs. The agents disagree about the appropriate pure rate of time preference to use when choosing a consumption policy, and thus delegate the management of the resource to...

Economic evaluation of climate policy traditionally treats uncertainty by appealing to expected utility theory. Yet our knowledge of the impacts of climate policy may not be of sufficient quality to be described by unique probabilistic beliefs. In such circumstances, it has been argued that the...

The selection of climate policies should be an exercise in risk management reflecting the many relevant sources of uncertainty. Studies of climate change and its impacts rarely yield consensus on the distribution of exposure, vulnerability, or possible outcomes. Hence policy analysis cannot...