@TechReport{economics.dp.2007-18,
 author = {Fouquin, Michel, Nayman, Laurence, and Wagner, Laurent},
 title = {Vertical Production Networks: Evidence from France},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2007},
 number = {2007-18},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2007-18}
}