This study, under the leadership of Genia Kostka (Professor of Governance of Energy and Infrastructure, Hertie School), analyses the scale, patterns and causes of cost overruns in 170 large public infrastructure projects in Germany. Discussants: Martin Delius (Member of the Berlin Parliament, Piratenpartei Berlin), Heinz Dürr (Chairman, Heinz & Heide Dürr Foundation), Mathias Oberndörfer (Divisional Director Public Sector, KPMG AG), and Andreas Wagner (Managing Director, Foundation OFFSHORE WIND ENERGY). Moderation: Jobst Fiedler (Resident Senior Fellow, Hertie School).