Hansjörg Gaus studied business administration at the University of Mannheim, graduating with a degree in business administration, and received his doctorate from the Technical University of Chemnitz with an empirical thesis on consumer behavior research. He heads the Environment, Climate & Nature division of CEval GmbH and also conducts project and program evaluations in the fields of education, science and research. Mr. Gaus was editor of the Journal of Evaluation for more than ten years and has published numerous papers in journals and edited volumes, especially on evaluation methodology and environmental and consumer issues.