“…Since the ows from these cities to others are similar, there is an equal interaction potential, and no enhanced interaction between certain cities is observed. Cities with a really small entropy value, such as Borsbeek (12), Edegem (17), Mortsel (42), Oud-Turnhout (46), Schoten (56) and Zwijndrecht (70), are an indication of a substantial preferential ow from this city. This means that these cities all have clear enhanced interactions with one or more specic cities, meaning preferred interaction potentials as well.…”