@TechReport{economics.dp.2009-53,
 author = {Beckmann, Volker, Soregaroli, Claudio, and Wesseler, Justus},
 title = {Ex-Ante Regulation and Ex-Post Liability under Uncertainty and Irreversibility: Governing the Coexistence of GM Crops},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2009},
 number = {2009-53},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2009-53}
}