JENS STEFFEK is Lecturer in Political Science at Jacobs University Bremen, Germany. He has published widely on international organizations, global governance and transnational civil society. KRISTINA HAHN is Research Associate at the Collaborative Research Centre 'Transformations of the State' at the University of Bremen, Germany.

• Introduction: Transnational NGOs and Legitimacy, Accountability, Representation; J.Steffek & K.Hahn PART I: NGO LEGITIMACY The Debate on NGOs' Legitimacy: What Can we Learn from the Classics?; L.Schrader & T.Denskus Legitimating INGO Advocacy: The Case of Internal Democracies; D.Halpin& P.Mc Laverty The Link between Standard-Setting NGOs' Legitimacy and Effectiveness: An Exploration of Social Mechanisms; M.Beisheim & K.Dingwerth Assessing the Democratic Legitimacy of Transnational NGOs: Five Criteria; J.Steffek, R.Bendrath, S.Dalferth, K.Hahn, M.Piewitt & M.Rodekamp PART II: NGO ACCOUNTABILITY These Pages have been Regulated for You: Issues Arising from the Governance of Markets by NGOs; J.Bendell, P.Jay & M.Bendell Accountability 2.0: In Search for a New Approach to International Non-Governmental Organizations' Accountability; M.Havrda & P.Kutilek PART III: REPRESENTATION THROUGH NGOS? Representing the People? NGOs in International Negotiations; T.Brühl Regulating NGO Participation in the EU; A De-Facto Accreditation System Built on 'Representativeness'?'; J.Greenwood NGOs' Power of Advocacy: The Construction of Identities in UN Counter-Human Trafficking Policies; K.Hahn PART IV: CONCLUSIONS Evaluating NGOs: A Practitioner's Perspective; R.Heggli Evaluating NGOs: Prospects for Academic Analysis; J.Steffek & K.Hahn