Dr Erika Palmer, an expert on systems engineering and member of the engineering faculty at Cornell University in the United States, visited the JRC Sevilla over three days (10-12 June) to advise on the construction of POLYTROPOS, a new system dynamics model for the evaluation of transformative innovation policies. She delivered several seminars to showcase some of her research and specific applications of SD to policy problems from various policy areas, including socio-technical transitions, systems thinking and consultancy work for the US government.