Just how important social context is for voluntary contributions is investigated in a natural field experiment, where subjects made either actual or hypothetical contributions to a national park in…

In a natural field experiment, the authors quantified the importance of anonymity, reciprocity, and conformity through the provision of social reference levels in order to explain voluntary…

The purpose of this paper is to test the absolute as well as the relative importance of these three reasons for non-selfish behavior. This is done by conducting a natural field experiment on voluntary…

We investigate the importance of the social context for people’s voluntary contributions to a national park in Costa Rica, using a natural field experiment. This present paper presents results of a…

This paper seeks to provide the theoretical underpinnings for the optimal pricing of protected areas used in recreational activities, from the perspective of a local park agency interested in…

We find, using survey-experimental methods, that most individuals are concerned with both relative income and relative consumption of particular goods. The degree of concern varies in the expected…

The objective of this report is to explore the impact of agriculture on biodiversity conservation in Central America, identify the factors which perpetuate or exacerbate agricultural systems or…

The main objective of thus study is to contribute to the design of policies dealing with the problems of congestion and air pollution in the urban context of a typical developing country. In this…

Choice experiments are becoming ever more frequently applied to the valuation of non-market goods. The purpose of this paper is to give a detailed description of the steps involved in a choice…

This thesis consists of five papers dealing with fairly heterogeneous issues, based on the problems or topics analyzed, but also based on the methodologies used to approach them. The overriding…