Ger Klaassen joined the European Commission in 2004, after working as economist at the International Institute for Applied Systems Analysis (IIASA). At IIASA he worked on transboundary air pollution and economic instruments, global energy scenarios, renewable energy policies and gas infrastructures. He holds a PhD in economics from the Free University in Amsterdam. He was visiting professor at Colorado College and the University of Economics and Business Administration in Vienna, teaching environmental economics and innovation. Currently he works as policy analyst on strategy and economic assessment of the Directorate General for Climate Action of the European Commission. He contributes to the economic analysis of the EU climate energy policy i.e. the macroeconomic impacts and co-benefits for air pollution.