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…

Empirical evidence suggests that people’s risk-perceptions are often systematically biased. This paper develops a simple framework to analyse public policy when this is the case. Expected utility…

This article investigates the effects of wheat genetic diversity and land degradation on risk and agricultural productivity in less favored production environments of a developing agricultural economy…

This study will review the past studies of the cost of land degradation in Ethiopia, assess the major methodological and conceptual issues and problems existing in the different approaches, compare…

This thesis consists of six papers, related to artifactual field experiments, conducted in South Africa. The main focus of the thesis is the effect of different forms of heterogeneity on cooperation…

This paper offers a baseline data for future assessment of the extent to which Marine Parks improve households’ welfare and reduce poverty in the Tanzanian Coastal area. Household Budget Survey Data…

Imbrasia Belina also known as the mopane worm, like other edible insects and caterpillars, is a vital source of protein to Southern African countries. The worms live and graze on mopane trees, which…

We evaluated the intention, implementation, and impact of Costa Rica’s program of payments for environmental services (PSA), which was established in the late 1990s. Payments are given to private…