The Biodiversity Economics research group aims at improving the scientific basis for sustainability in human-nature relationships, studying the sustainable use of renewable natural resources (e.g. marine fisheries) and conservation of biodiversity from regional to global. We study how economic incentives shape behavior towards nature, what sustainability – understood as justice in human-nature relationships – means, and how economic policy instruments could contribute to that end. Our methodical expertise comprises quantitative ecological-economic modeling, dynamic optimization, statistics, economic experiments, conceptual modeling, game theory and capital theory. Our research group is internationally well connected. We engage in integrative interdisciplinary research with natural and social scientists and researchers from the humanities. Former doctoral researchers of Martin Quaas' group have now professorships at leading universities in North America and Europe; work for the government, or in the private sector.