208981 Danalet_DCAws15 TRANSP-OR TALK Danalet, Antonin Bierlaire, Michel Activity path size for correlation between activity paths 2015 Tenth Workshop on Discrete Choice Models EPFL, Lausanne, Switzerland May 29, 2015 In the activity path choice approach, the activity-episode sequence is modeled as a path in an activity network defining the activity type, duration and time of day. The IIA property might not be appropriate in the activity path approach since activity paths share unobserved attributes due to overlaps. Overlaps correspond to performing the same activity type at the same time and might be correlated. In this talk, we first show that the traditional Path Size correction term cancels out in the activity path approach and then propose two different deterministic corrections for correlation, the Primary Activity Path Size (PAPS) and the Activity Pattern Path Size (APPS), for the utility of overlapping activity paths. EPFL-TALK-208981