The integration of the gravity and intervening-opportunities model in the recent paper by Gonçalves and Ulysséa-Neto provokes interesting questions on the role of the number of intervening opportunities on either decreasing or increasing travel. In this note I discuss such issues, as well as making comparisons with recent innovations in spatial interaction theory.
Get full access to this article
View all access options for this article.
References
1.
FotheringhamA S, 1986, “Modelling hierarchical destination choice”Environment and Planning A18401–418
2.
GonçalvesM BUlysséa-NetoI, 1993, “The development of a new gravity—opportunity model for trip distribution”Environment and Planning A25817–826
3.
RoyJ R, 1983, “Estimation of singly-constrained nested spatial interaction models”Environment and Planning B: Planning and Design10269–274
