Bart Lahcen is an economist and guest professor at Hasselt University in Belgium, with a PhD from KU Leuven. He works as an evaluation officer at the European Commission’s Joint Research Centre and has previously worked in the private sector, academia, and non-governmental organizations. He is writing a book on the reliability of economic knowledge and what happens to it on the way from research to decision-making, drawing on both research and his experience of seeing the same evidence used differently across those settings.