A diploma thesis at Ludwigshafen University of Applied Sciencem:con has discovered that Congress Center Rosengarten in Mannheim generates indirect sales of 53 million euros every year, with meetings and conventions accounting for 47 million. This figure is based on a sum of 140 euros that each meeting-goer spends on average in the city. It does not include travel costs, participation fees and tickets. www.mcon-mannheim.de