Start of a new research collaboration: On 23 October, the first workshop of the Leibniz Schience Campus Ruhr (LSCR) took place. The research focus of LSCR lies in regional differences in health care, sustainability of health care supply and prevention. Its aim is to analyse the causes and consequences of regional differences in health care, to derive policies to address the impending under-provision of health care and to evaluate selected measures to improve the efficiency of health-care provision. On the occasion of this workshop, the president of the Leibniz Association Prof. Dr.-Ing. Matthias Kleiner visited the RWI – Leibniz Institute for Economic Research. At the LSCR researchers of RWI, University of Duisburg-Essen and Tilburg University work together. The campus is funded by the Leibniz Association.