1 resultado para Artificial Information Models
em Collection Of Biostatistics Research Archive
Filtro por publicador
- JISC Information Environment Repository (1)
- ABACUS. Repositorio de Producción Científica - Universidad Europea (1)
- Aberystwyth University Repository - Reino Unido (7)
- AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
- Aquatic Commons (9)
- Archive of European Integration (14)
- Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (17)
- Aston University Research Archive (10)
- Avian Conservation and Ecology - Eletronic Cientific Hournal - Écologie et conservation des oiseaux: (1)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (2)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (18)
- Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (3)
- BORIS: Bern Open Repository and Information System - Berna - Suiça (6)
- Boston University Digital Common (3)
- Brock University, Canada (4)
- Bulgarian Digital Mathematics Library at IMI-BAS (4)
- CaltechTHESIS (4)
- Cambridge University Engineering Department Publications Database (62)
- CentAUR: Central Archive University of Reading - UK (70)
- Chinese Academy of Sciences Institutional Repositories Grid Portal (13)
- Cochin University of Science & Technology (CUSAT), India (6)
- Collection Of Biostatistics Research Archive (1)
- CORA - Cork Open Research Archive - University College Cork - Ireland (5)
- CUNY Academic Works (2)
- Dalarna University College Electronic Archive (11)
- Deakin Research Online - Australia (61)
- Department of Computer Science E-Repository - King's College London, Strand, London (1)
- DI-fusion - The institutional repository of Université Libre de Bruxelles (1)
- Digital Commons - Michigan Tech (1)
- Digital Commons at Florida International University (2)
- DigitalCommons@The Texas Medical Center (2)
- DRUM (Digital Repository at the University of Maryland) (1)
- Duke University (9)
- eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (5)
- Greenwich Academic Literature Archive - UK (9)
- Helda - Digital Repository of University of Helsinki (13)
- Indian Institute of Science - Bangalore - Índia (32)
- Instituto de Engenharia Nuclear, Brazil - Carpe dIEN (1)
- Instituto Politécnico de Bragança (1)
- Instituto Politécnico do Porto, Portugal (6)
- Massachusetts Institute of Technology (10)
- Memorial University Research Repository (1)
- Ministerio de Cultura, Spain (1)
- Open University Netherlands (1)
- Plymouth Marine Science Electronic Archive (PlyMSEA) (6)
- Portal de Revistas Científicas Complutenses - Espanha (1)
- Publishing Network for Geoscientific & Environmental Data (1)
- QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (63)
- Queensland University of Technology - ePrints Archive (358)
- Repositório Científico do Instituto Politécnico de Lisboa - Portugal (1)
- Repositório digital da Fundação Getúlio Vargas - FGV (6)
- Repositório Institucional da Universidade de Aveiro - Portugal (7)
- Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (7)
- Research Open Access Repository of the University of East London. (1)
- RUN (Repositório da Universidade Nova de Lisboa) - FCT (Faculdade de Cienecias e Technologia), Universidade Nova de Lisboa (UNL), Portugal (5)
- SAPIENTIA - Universidade do Algarve - Portugal (6)
- Universidad de Alicante (2)
- Universidad del Rosario, Colombia (7)
- Universidad Politécnica de Madrid (21)
- Universidade de Lisboa - Repositório Aberto (2)
- Universidade Federal do Rio Grande do Norte (UFRN) (2)
- Universitat de Girona, Spain (9)
- Universitätsbibliothek Kassel, Universität Kassel, Germany (4)
- Université de Lausanne, Switzerland (2)
- Université de Montréal, Canada (22)
- University of Queensland eSpace - Australia (10)
- University of Washington (2)
- WestminsterResearch - UK (2)
- Worcester Research and Publications - Worcester Research and Publications - UK (2)
Resumo:
In linear mixed models, model selection frequently includes the selection of random effects. Two versions of the Akaike information criterion (AIC) have been used, based either on the marginal or on the conditional distribution. We show that the marginal AIC is no longer an asymptotically unbiased estimator of the Akaike information, and in fact favours smaller models without random effects. For the conditional AIC, we show that ignoring estimation uncertainty in the random effects covariance matrix, as is common practice, induces a bias that leads to the selection of any random effect not predicted to be exactly zero. We derive an analytic representation of a corrected version of the conditional AIC, which avoids the high computational cost and imprecision of available numerical approximations. An implementation in an R package is provided. All theoretical results are illustrated in simulation studies, and their impact in practice is investigated in an analysis of childhood malnutrition in Zambia.