The revitalization of Machakos, Kenya, from overpopulation and resource degradation—seemingly by its population growth—has added another round to the Boserupian vs. Malthusian debate, and may make…

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 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…

Although conventional economic theory proposes that only the absolute levels of income and consumption matter for people’s utility, there is much evidence that relative concerns are often important…

This study employed a choice experiment (CE) to ascertain consumer preferences and willingness to pay (WTP) for non-market food product quality attributes. Data were obtained from a large mail survey…

This paper analyses the impact of income inequality on public good provision in an experimental setting. A sample of secondary school students were recruited to participate in a simple linear public…

The European Union has been relatively cautious about using biotechnology in food production. A label regime combined with the right of individual member states to ban introduction of new genetically…

Land degradation poses a serious problem for the livelihoods of rural producers. Furthermore, there is rarely enough private investment taking place to commensurate the scale of the problem. This…

Poverty alleviation would remain a crucial part of the overall development agenda in Ethiopia in the years to come. The economy is among the most vulnerable in sub-Saharan Africa and with per capita…