The main research topics include climate economics, sustainability, exhaustible resources,  environmental policy and trade, technological change and costs of environmental policy. Gerlagh is also involved in academic policy discussions.

Research is both theoretical (formal), as empirical (econometric), as applied (simulations). Theory papers include studies on the exhaustible resource market (strategic resource dependence), studies on the relation between the market for fossil fuels and climate change policy (the green paradox), and studies on climate policies, preferences, risk, demography. Empirical research considers the effect of energy policy on the location of energy-intensive industries, the effect of vehicle regiistration policies on verhicle purchases, the effect of natural resources on growth. An example of applied research calculates the cost reductions that can be reached through learning effects for renewable energy sources in climate change policy (here), the effect of myopic preferences on credible climate targets, and a simple formula for the social costs of carbon.

In 1999 Reyer Gerlagh received his PhD in economics. In 2001, he received the Vernieuwingsimpuls, a prestigious grant of ? 650,000 by the Netherlands Organisation for Scientific Research (NWO) for his innovative research. He has published in many international journals, and as a co-promotor he has guided his PhD students to various published papers. For January-June 2006, he has been invited by the Norwegian Academy of Science and Letters to Oslo to come to the Centre of Advanced Studies to join a research group on the interaction between environmental policy and technology. Between September 2006 and 2009, he held the chair in Environmental Economics at Economics, School of Social Sciences, University of Manchester, UK. Reyer Gerlagh is now Professor at Tilburg University and associate editor of ERE and Energy Economics, and member of the editorial board of JEEM

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