Economics: The Open-Access, Open Assessment E-Journal http://www.economics-ejournal.org en Roger Bjørnstad Kjartan Øren Kalstad Increased Price Markup from Union Coordination―OECD Panel Evidence 2010-10-15 URIdoi:10.5018/economics-ejournal.ja.2010-30JEL C23 JEL E31 JEL J51