In March I went to Ghana together with another student and our professor Daan van Soest to conduct a field experiment for our thesis. In cooperation with the World Bank and the government of Ghana, we conducted an experiment with farmers in the North of Ghana. This experiment is part of a large project, the Sustainable Land and Water Management Project, which is aimed at reducing land degradation and to enhance maintenance of biodiversity by planting trees. To increase the number of trees which survive, farmers are financially incentivized to take care of the trees. In our experiment we tested different treatments to select farmers to participate in the program.