This note incorporates ecological interactions into the Noah's Arch problem [M.L. Weitzman, The Noah's Arch problem, Econometrica 66(6) (1998) 1279-1298]. In doing so, we arrive at a general model for ranking in situ conservation projects accounting for species interrelations and provide an...

In many Sub-Saharan African countries, farmers typically have a choice between selling their pro ducts to traders who travel between villages and markets and transporting their products to the nearest market themselves. Because of communities' remoteness and poor communications with...

Nous étudions une négociation à offres alternées visant à la ratification d’un accord international sur le changement climatique. Trois coalitions aux intérêts divergents sont considérées : la coalition des pays développés pro-régime menée par l’Union européenne, la coalition...

Global issues such as climate change, depletion of the ozone layer and bio-diversity loss call for a coordination of national environmental policies. In this paper, we focus on the conditions for mediation to promote cooperation. We consider two coalitions of countries that participate in an...

We consider a bargaining game aiming at the full ratification of a climate treaty. Three distinct coalitions are considered: a pro-regime coalition, the so-called Kyoto group, an anti-regime coalition made of the countries rejecting the Kyoto protocol and the G77 coalition made of developing...