Modelling Missing Values for Audience Measurement in Outdoor Advertising Using GPS Data. - Michael May 001; Christine Körner; Dirk Hecker; Martial Pasquier; Urs Hofmann; Felix Mende (GI Jahrestagung, 2009)

Handling missing values in GPS surveys using survival analysis: a GPS case study of outdoor advertising. - Michael May 001; Christine Körner; Dirk Hecker; Martial Pasquier; Urs Hofmann; Felix Mende (KDD Workshop on Data Mining and Audience Intelligence for Advertising, 2009)