Saudi Arabia and the Shifting Geoeconomics of Oil. Carnegie Endowment for International Peace. 2015, 21 May.
Between a rock and a hard place : international market dynamics, domestic politics and Gazprom’s strategy. Florence School of Regulation Working Paper 22/2015.
Can Europe survive without Russian gas? Maybe, but it should not have to. Policy Brief, German Marshall Fund of the United States, 02 (3) March 2015.
The EU’s Soft Power with a Hard Edge in Energy: Implications for EU Policy Strategy and Energy Security. House of Lords European Policy Brief, London, November 2014.
The politics of natural gas development in the European Union. The Geopolitics of Natural Gas. Harvard Belfer Center / Rice University, October 2013, 1-44.
Addressing Carbon Emissions and Oil Price Volatility. Challenges and Opportunities for Transatlantic Energy Cooperation. Transatlantic Agenda Paper, GPPi and Brookings, February 2012.
Does Imported Oil Threaten U.S. National Security? RAND Research Brief, May 2009
Improving Russian Energy Efficiency: Next Steps. Russian Analytical Digest, (48) 2008, 9-12.
“Energy-NATO” and “Energy-KSZE”. Adäquate Instrumente zur Sicherung der europäischen Energieversorgung?[“Energy-NATO” and “Energy-CSCE”. Adequate Instruments to secure European energy supply?]. SWP Discussion Paper, May 2007, German Institute for International and Security Affairs, Berlin (co-authored with Oliver Geden and Timo Noetzel)
Der GECF-Gipfel in Katar und die Erfolgsaussichten einer “Gas-OPEC” [GECF’s Qatar Summit and the prospects of a “Gas OPEC”], SWP Policy Brief 26/2007, German Institute for International and Security Affairs (SWP), Berlin.
Global Energy Security. The Challenges Ahead and how to Meet Them. MSC Booklet Paper No. 1, Munich Security Conference 2010