Nils Kok is Professor in Finance and Real Estate at Maastricht University. His research interests range from urban economics to real estate investments, with a strong focus on the economics of energy efficiency and sustainability in the real estate sector. In addition, he serves as Chief Economist at GeoPhy, the leading provider of automated valuations for the real estate sector, combining advanced research and reporting tools with a database that currently covers over 100 million buildings across 50 countries. Previously, Kok was the founder and CEO of GRESB, a global ESG rating company for real estate and infrastructure investments. His research has appeared in leading academic journals such as the American Economic Review, The Review of Economics and Statistics, The Journal of Public Economics, The RAND Journal of Economics, and Real Estate Economics; in newspapers, such as the Guardian, the Australian Financial Review, Das Handelsblatt, Le Monde and Het Financieele Dagblad; and in industry publications, such as Bloomberg, Europe Real Estate and Vastgoedmarkt. Kok received his PhD from Maastricht University.