@misc{HerbstWalz2009,
  author    = {Patrick Herbst and Uwe Walz},
  title     = {The design of vertical R\&D collaborations},
  booktitle = {Center for Financial Studies (Frankfurt am Main): CFS working paper series ; No. 2009,06},
  institution = {Center for Financial Studies (CFS)},
  series    = {CFS working paper series},
  number    = {2009, 06},
  type      = {workingpaper},
  year        = {2009},
}