We consider a model where a given number of firms decide on a pollution-reducing production technology, and then hire workers who subsequently form a monopoly union which sets the wage. We study the possibility of "double dividents", i.e. simultaneous reduction in pollution and increases in...

In order to reach a Pareto optimal outcome with transboundary environmental problems, there must be some kind of international environmental agreement. One possibility is to have an international environmental agreement focusing directly on emissions in each country. Given such an agreement, an...

In an in_nite horizon optimal control problem, the Hamiltonian vanishes at the in_nite horizon, when the di_erential equation is autonomous. The integrand in the integral criterion may contain the time explicitly, but it has to satisfy certain integrability conditions. A generalization of...

Discounting in the presence of catastrophic risk is a hotly debated issue, in particular with respect to climate change. Many scientists and laymen concerned with potentially catastrophic impacts feel that if an increase in the discount rate drastically increases the likelihood of catastrophic...