[ABE-L] Seminário - Modelos de Regressão e Aplicações - Marcos Prates - Where geography lives? A projection approach for spatial confounding

[Silvia Ferrari]

*Seminário - Projeto Temático: Modelos de Regressão e Aplicações*



*Título: *Where geography lives? A projection approach for spatial
confounding



*Palestrante:* Marcos Prates – Departamento de Estatística, UFMG



*Quando: *11 de novembro de 2016, sexta-feira, às 11h.



*Onde: *Auditório Antonio Gilioli – Bloco A, segundo andar - IME-USP



*Resumo*. Spatial confounding between the spatial random effects and fixed
effects covariates has been recently discovered and showed that it may
bring misleading interpretation to the model results. Solutions to
alleviate this problem are based on decomposing the spatial random effect
and fitting a restricted spatial regression. In this paper, we propose a
different approach: a transformation of the geographic space to ensure that
the unobserved spatial random effect added to the regression is orthogonal
to the fixed effects covariates. Our approach, named SPOCK, has the
additional benefit of providing a fast and simple computational method to
estimate the parameters. Furthermore, it does not constrain the
distribution class assumed for the spatial error term. A simulation study
and a real data analysis are presented to better understand the advantages
of the new method in comparison with the existing ones

Joint work with Renato Martins Assunção and Erica Castilho Rodrigues.
-------------- Próxima Parte ----------
Um anexo em HTML foi limpo...
URL: <https://lists.ime.usp.br/archives/abe/attachments/20161107/595e12b3/attachment.html>