Jörnsten, Kurt; Thorsen, Inge; Ubøe, Jan - In: Environment and Planning A 36 (2004) 2, pp. 347-364
In this paper we will consider gravity models for journeys to work. In applications of the theory it is sometimes assumed that the parameters in such models are fixed. We will provide examples to show that this is not always a reasonable assumption, for instance, when the model is applied to...
