Efficiency of collective bargaining Analysing changes in the wage structure in the public sector in Iceland Katrin Olafsdottir School of Business, Reykjavik University * Draft February 2009 * Mail address: Reykjavik University, Ofanleiti 2, 103, Reykjavik, Iceland. E-mail: katrino@ru.is , Telephone: +354-599-6421.