Bade, Sophie Max Planck Institute for Research on Collective Goods, Max Planck Society;
http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1946736 (Any fulltext)
http://www.coll.mpg.de/pdf_dat/2011_25online.pdf (Preprint)
Bade, S. (2011). Divergent Platforms.