- PV Investor Guide New business models for photovoltaics in international markets. BSW. 2014.
- Advising the BMU concerning the organisation plan, program and budget of the International Renewable Energy Agency (IRENA). With Adelphi Research. For BMU. April – Dezember 2009.
- Advancement of export of renewable technologies into the US: Feasibility Studies USTDA. Under the patronage of Adelphi Consult. 2010. For BMU and UBA. 2010.
- 300.000 Clean Energy Jobs. Low Carbon Growth in the U.S. and Europe. Heinrich-Boell Stiftung North America. 2010.
- Comparison of German and US government support mechanisms for clean energy exports. US D.O.E and LNBL. 2009.
- PV Grid Parity Map