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...

This paper discusses the Brazilian rural development model in the context of Green Economy and the debate about sustainable development, issues that have been discussed in international sphere. In this way, conceptions and new concepts have been defined which clarify the ideas and mechanisms...