The author analyzes the optimal investment in environmental protection in a model of non-overlapping hyperbolically discounting agents. He shows that, in the long run and in the absence of a commitment device, society is stuck in a situation where all agents prefer further investments, yet no...

In this paper, we extend the well known result that hyperbolically discounting agents tend to postpone costs into the future. In a simple model we show that, without commitment to the ex ante optimal plan, no investment in environmental protection is undertaken over the whole time horizon, no...