@book{Maercker1997,
  author    = {Maercker, Gisela},
  title     = {Statistical inference in conditional heteroskedastic autoregressive models},
  publisher = {Shaker},
  address   = {Aachen},
  isbn      = {3-8265-2486-1},
  pages     = {87 S.: graph. Darst.},
  year      = {1997},
  language  = {en}
}
@book{LinkeHaertschHoffmannetal.1997,
  author    = {Linke, David-Michael and Haertsch, P. and Hoffmann, C. P. and Lindemann, Markus},
  title     = {Integrierte Electronic Commerce Systeme - Auswahlkriterien und Evaluation aktueller Produktangebote. Bericht BusinessMedia. 58},
  publisher = {Inst. f{\"u}r Wirtschaftsinformatik},
  address   = {St. Gallen},
  pages     = {VII, 94 S. : graph. Darst.},
  year      = {1997},
  language  = {de}
}
@book{FredebeulKrein1998,
  author    = {Fredebeul-Krein, Markus},
  title     = {Marktzutrittsregulierungen im Handwerk und bei technischen Dienstleistungen : eine {\"o}konomische Analyse / Markus Fredebeul-Krein ; Angela Sch{\"u}rfeld},
  publisher = {Inst. f{\"u}r Wirtschaftspolitik an der Univ. K{\"o}ln},
  address   = {K{\"o}ln},
  isbn      = {3-933812-00-3},
  pages     = {VII, 182 S. : graph. Darst.},
  year      = {1998},
  language  = {de}
}
@book{FredebeulKreinDongesEckhoffetal.1998,
  author    = {Fredebeul-Krein, Markus and Donges, J{\"u}rgen and Eckhoff, Johann and Freytag, Andreas},
  title     = {Die Rolle des Staates in der globalisierten Wirtschaft / Donges, J{\"u}rgen B., Eekhoff, Johann; Fredebeul-Krein, Markus [u.a.]},
  publisher = {Lucius und Lucius},
  address   = {Stuttgart},
  isbn      = {3-8282-0058-3},
  pages     = {VI,320 S., graph. Darst., Tab.,},
  year      = {1998},
  language  = {de}
}
@book{Grap1998,
  author    = {Grap, Rolf Dietmar},
  title     = {Produktion und Beschaffung: eine praxisorientierte Einf{\"u}hung},
  publisher = {Vahlen},
  address   = {M{\"u}nchen},
  isbn      = {3-8006-2321-8},
  pages     = {XVII, 344 S. : graph. Darst.},
  year      = {1998},
  language  = {de}
}
@book{JanzEblingHippetal.1998,
  author    = {Janz, Norbert and Ebling, G{\"u}nther and Hipp, C. and Licht, Georg},
  title     = {Dienstleistungen in der Zukunft : Innovationsaktivit{\"a}ten im Dienstleistungssektor ; Befragung 1997 ; Kurzfassung / Janz, N., G. Ebling, C. Hipp, G. Licht und H. Niggemann},
  publisher = {ZEW Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsf{\"o}rderung},
  address   = {Mannheim},
  year      = {1998},
  language  = {de}
}
@book{JanzEblingHippetal.1998,
  author    = {Janz, Norbert and Ebling, G{\"u}nther and Hipp, C. and Licht, Georg},
  title     = {Innovationsaktivit{\"a}ten im Dienstleistungssektor. Erhebung 1997 / Janz, N., G. Ebling, C. Hipp, G. Licht und H. Niggemann},
  publisher = {ZEW Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsf{\"o}rderung},
  address   = {Mannheim},
  year      = {1998},
  language  = {de}
}
@book{JanzEblingGoeggerleetal.1998,
  author    = {Janz, Norbert and Ebling, G{\"u}nther and G{\"o}ggerle, J. and Licht, Georg},
  title     = {The Longitudinal Aspect of Innovation Surveys / G. Ebling, J. G{\"o}ggerle, N. Janz, G. Licht und H. Stahl},
  publisher = {ZEW Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsf{\"o}rderung},
  address   = {Mannheim},
  year      = {1998},
  language  = {en}
}
@book{JanzEblingNiggemannetal.1998,
  author    = {Janz, Norbert and Ebling, G{\"u}nther and Niggemann, Hiltrud and Stahl, Harald},
  title     = {2nd Community Innovation Survey. 1st Interim Report. Report prepared for Eurostat / Ebling, G., N. Janz, H. Niggemann und H. Stahl},
  publisher = {ZEW Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsf{\"o}rderung},
  address   = {Mannheim},
  year      = {1998},
  language  = {en}
}
@book{GottschalkJanzRennings1998,
  author    = {Gottschalk, Sandra and Janz, Norbert and Rennings, Klaus},
  title     = {Characteristics and Performance of Eco-Innovative Firms in the German Service Sector},
  pages     = {mimeo},
  year      = {1998},
  language  = {en}
}