Lancaster EPrints

Geostatistical inference under preferential sampling

Diggle, Peter J. and Menezes, Raquel and Su, Ting-li (2010) Geostatistical inference under preferential sampling. Journal of the Royal Statistical Society: Series C (Applied Statistics), 59 (2). pp. 191-232. ISSN 0035-9254

Full text not available from this repository.

Abstract

Geostatistics involves the fitting of spatially continuous models to spatially discrete data. Preferential sampling arises when the process that determines the data locations and the process being modelled are stochastically dependent. Conventional geostatistical methods assume, if only implicitly, that sampling is non-preferential. However, these methods are often used in situations where sampling is likely to be preferential. For example, in mineral exploration, samples may be concentrated in areas that are thought likely to yield high grade ore. We give a general expression for the likelihood function of preferentially sampled geostatistical data and describe how this can be evaluated approximately by using Monte Carlo methods. We present a model for preferential sampling and demonstrate through simulated examples that ignoring preferential sampling can lead to misleading inferences. We describe an application of the model to a set of biomonitoring data from Galicia, northern Spain, in which making allowance for preferential sampling materially changes the results of the analysis.

Item Type: Article
Journal or Publication Title: Journal of the Royal Statistical Society: Series C (Applied Statistics)
Uncontrolled Keywords: Environmental monitoring ; Geostatistics ; Log-Gaussian Cox process ; Marked point process ; Monte Carlo inference ; Preferential sampling ; MARKED POINT-PROCESSES ; DEPENDENT FOLLOW-UP ; AIR-POLLUTION ; POISSON INTENSITY ; LONGITUDINAL DATA ; COX PROCESSES ; VARIOGRAM ; MODEL ; DESIGN ; TEMPERATURE
Subjects: UNSPECIFIED
Departments: Faculty of Health and Medicine > Medicine
Faculty of Science and Technology > Mathematics and Statistics
ID Code: 51919
Deposited By: ep_importer_pure
Deposited On: 08 Dec 2011 14:58
Refereed?: Yes
Published?: Published
Last Modified: 28 Oct 2014 09:10
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/51919

Actions (login required)

View Item