@misc{Sanner2007,
  author    = {Helge Sanner},
  title     = {Instability in competition},
  institution = {Wirtschaftswissenschaften},
  series    = {Volkswirtschaftliche Diskussionsbeitr{\"a}ge},
  number    = {79},
  type      = {workingpaper},
  year        = {2007},
}