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28 p, 875.4 KB

Granger causality and time series regression for modelling the migratory dynamics of influenza into Brazil / Foerster Grande, Aline (Universidade Federal do Rio Grande do Sul (Brasil)) ; Pumi, Guilherme (Universidade Federal do Rio Grande do Sul (Brasil)) ; Cybis, Gabriela Bettella (Universidade Federal do Rio Grande do Sul (Brasil))
In this work we study the problem of modelling and forecasting the dynamics of the influenza virus in Brazil at a given month, from data on reported cases and genetic diversity collected from previous months, in other locations. [...]
2022 - DOI (Digital Object Identifier)

10.2436/20.8080.02.122
SORT : statistics and operations research transactions, Vol. 46 Núm. 2 (2022) , p. 161-188 (Articles)

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28 p, 2.0 MB

Compositional combination and selection of forecasters / Martín Arroyo, Antonio (Universidad Autónoma de Madrid) ; de Juan Fernández, Aránzazu (Universidad Autónoma de Madrid)
The Split-Then-Combine approach has previously been used to generate the weights of forecasts in a combination in the Euclidean space. This paper extends this approach to combine forecasts inside the simplex space, the sample space of positive weights adding up to one. [...]
2022 - DOI (Digital Object Identifier)

10.2436/20.8080.02.123
SORT : statistics and operations research transactions, Vol. 46 Núm. 2 (2022) , p. 189-216 (Articles)

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28 p, 783.0 KB

Missing data analysis and imputation via latent Gaussian Markov random fields / Gómez-Rubio, Virgilio (Universidad de Castilla-La Mancha) ; Cameletti, Michela (University of Bergamo) ; Blangiardo, Marta (Imperial College London)
This paper recasts the problem of missing values in the covariates of a regression model as a latent Gaussian Markov random field (GMRF) model in a fully Bayesian framework. The proposed approach is based on the definition of the covariate imputation sub-model as a latent effect with a GMRF structure. [...]
2022 - DOI (Digital Object Identifier)

10.2436/20.8080.02.124
SORT : statistics and operations research transactions, Vol. 46 Núm. 2 (2022) , p. 217-244 (Articles)

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18 p, 618.7 KB

Alternate-wrapped circular distributions / Joshi, Savitri (Indian Institute of Information Technology Allahabad (Índia)) ; Rattihalli, R. N.
To generate a circular distribution, we use the alternate-wrapping technique (unlike the usual wrapping), by wrapping in the alternate directions, after each single-wrapping. The resulting distribution is called alternate-wrapped distribution. [...]
2022 - DOI (Digital Object Identifier)

10.2436/20.8080.02.125
SORT : statistics and operations research transactions, Vol. 46 Núm. 2 (2022) , p. 245-262 (Articles)

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