Analysis of local influence in geostatistics using Student%26apos;s t-distribution

作者：Assumpcao R A B^*; Uribe Opazo M A; Galea M

来源：Journal of Applied Statistics, 2014, 41(11): 2323-2341.

DOI：10.1080/02664763.2014.909793

• spatial variability
• Q-displacement of likelihood
• EM algorithm
• diagnostics

This article aims to estimate parameters of spatial variability with Student%26apos;s t-distribution by the EM algorithm and present the study of local influence by means of two methods known as likelihood displacement and Q-displacement of likelihood, both using Student%26apos;s t-distribution with fixed degrees of freedom (nu). The results showed that both methods are effective in the identification of influential points.

• 出版日期2014-11