Electronic Resource
Oxford, UK
:
Blackwell Publishing Ltd
Journal of regional science
25 (1985), S. 0
ISSN:
1467-9787
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Geography
,
Economics
Notes:
In this paper we present a procedure for estimating small changes in gravity model forecasts in response to small changes in input values (trip end totals and/or parameter values). The procedure can be used to derive covariance matrices from which confidence intervals may be obtained and which may be used for tests of hypotheses. While this type of problem has been addressed by others, our approach is the only one that is conveniently applicable to the doubly constrained model and can accommodate the large numbers of origin and destination zones one typically encounters.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1467-9787.1985.tb00303.x
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