Using a dynamic model of the control of an infectious disease, we derive the conditions under which eradication will be optimal. When eradication is feasible, the optimal program requires either a low vaccination rate or eradication. A high vaccination rate is never optimal. Under special...

Ever since the Framework Convention on Climate Change was adopted in 1992, negotiation of emission limits has been intertwined with efforts to define a threshold for “dangerous” climate change. In this chapter, I explain the logic behind this framing of the collective action problem; show...

This paper explores two different conceptions of how an emerging climate regime might evolve to strengthen incentives for more vigorous cooperation in mitigating global climate change. One is the paradigm that has figured most prominently in negotiations to this point: the establishment of...