HomeResearchPublications Research Paper Social custom, free-riders, and trade union membership in Germany and Great Britain By Laszlo Goerke and Markus Pannenberg Publication details Publication date 1 December 1998 Series or book DIW Discussion Papers Series or chapter number 177 Publisher Deutsches Institut fur Wirtschaftsforschung ISBN 14330210 (ISSN) http://www.diw.de/english/discussion_papers/32807.html Notes Series available on-line working paper Topics Labour Economics