Spatial modeling with spatially varying coefficient processes


Journal Article

In many applications, the objective is to build regression models to explain a response variable over a region of interest under the assumption that the responses are spatially correlated. In nearly all of this work, the regression coefficients are assumed to be constant over the region. However, in some applications, coefficients are expected to vary at the local or subregional level. Here we focus on the local case. Although parametric modeling of the spatial surface for the coefficient is possible, here we argue that it is more natural and flexible to view the surface as a realization from a spatial process. We show how such modeling can be formalized in the context of Gaussian responses providing attractive interpretation in terms of both random effects and explaining residuals. We also offer extensions to generalized linear models and to spatio-temporal setting. We illustrate both static and dynamic modeling with a dataset that attempts to explain (log) selling price of single-family houses.

Full Text

Duke Authors

Cited Authors

  • Gelfand, AE; Kim, HJ; Sirmans, CF; Banerjee, S

Published Date

  • June 1, 2003

Published In

Volume / Issue

  • 98 / 462

Start / End Page

  • 387 - 396

International Standard Serial Number (ISSN)

  • 0162-1459

Digital Object Identifier (DOI)

  • 10.1198/016214503000170

Citation Source

  • Scopus