TY - CPAPER AU - Albers, Sönke AU - Bielecki, André T1 - DEA with statistically estimated individual coefficients: A pharmaceutical sales force application T2 - Marketing & core disciplines : rediscovering references ED - Helfer, Jean-Pierre PY - 2009 SP - on CD-ROM C7 - Proceedings of the 38th EMAC Conference C1 - Audencia Nantes - France C4 - May 26 - 29 M4 - Citavi ER -