In this article we study the implication of thresholds in preferences. To model this we extend the basic model of John and Pecchenino (1994) by allowing the current level of environmental quality to have a discrete impact on how an agent trades o ff future consumption and environmental quality....

We derive an R&D-based semi-endogenous growth model where technological progressdepends on the available amount of technological opportunity. Incremental innovationsprovide direct increases in the knowledge stock but they reduce technological opportunityand thus the potential for further...

In this article we extend the recent literature on overlapping generations with a pollution sector by allowing generations to have a certain pollution perception with regards to the stock of pollution. Pollution perception, assumed to be part of the generations' preferences, can be either a...