  This paper continues to develop and explore the impact of multipurpose trips
on retail location. We develop the model of locating multiple competing
facilities of a chain where several competing facilities exist in the area.
There may be some existing facilities of the same chain as well. The addition
of multiple new outlets can cause cannibalization of existing sales, but this
effect is mitigated by selecting good locations, and the total market share
captured by the chain increases. The introduction of multipurpose trips
enhances the total market share of the location decision maker. Since in
reality many customers combine a visit to more than one facility in one
shopping trip, the model predicts the expected market share captured more
accurately. Therefore, the selected locations for new facilities are more
accurate as well.
