His major research interests include institutional complexity, global climate governance, deforestation, and the environmental role of the World Trade Organization. He is directing the international project NAVIGOV on ‘Navigating Institutional Complexity in Global Climate Governance’. The project is funded by the Swedish research council Formas and focuses on institutional fragmentation in three fields of climate governance: short-lived climate pollutants, reducing emissions from deforestation and forest degradation (REDD), and climate geo-engineering.