Impact of Covariates in Compositional Models and Simplicial Derivatives

Autor: Joanna Morais, Christine Thomas-Agnan

Publikováno v: Austrian Journal of Statistics, Vol 50, Iss 2 (2021)

In the framework of Compositional Data Analysis, vectors carrying relative information, also called compositional vectors, can appear in regression models either as dependent or as explanatory variables. In some situations, they can be on both sides

Externí odkaz: https://doaj.org/article/59c70bad772e4f6ca1d8d630096f139a

New psychoactive substances: 25 years of early warning and response in Europe. An update from the EU Early Warning System

Autor: Joanna Morais, Michael Evans-Brown, Ana Gallegos, Rachel Christie, Rita Jorge, Gregorio Planchuelo, Roumen Sedefov

Publikováno v: Toxicologie Analytique et Clinique. 34:S29-S30

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f7b81ee699897b3b05eee856ec134af9
https://doi.org/10.1016/j.toxac.2022.06.022

Relations between socio-economic factors and nutritional diet in Vietnam from 2004 to 2014: New insights using compositional data analysis

Autor: Huong Thi Trinh, Joanna Morais, Michel Simioni, Christine Thomas-Agnan

Publikováno v: Statistical Methods in Medical Research
Statistical Methods in Medical Research, SAGE Publications, 2019, 28 (8), pp.2305-2325. ⟨10.1177/0962280218770223⟩
Statistical Methods in Medical Research 8 (28), 2305-2325. (2019)

International audience; This paper contributes to the analysis of the impact of socioeconomic factors, like food expenditure level and urbanization, on diet patterns in Vietnam, from 2004 to 2014. Contrary to the existing literature, we focus on the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc71c7eefa39cb023c881066ac2ed8d0
https://doi.org/10.1177/0962280218770223

Interpretation of explanatory variables impacts in compositional regression models

Autor: Michel Simioni, Joanna Morais, Christine Thomas-Agnan

Publikováno v: Austrian Journal of Statistics 5 (47), 1-25. (2018)
Austrian Journal of Statistics
Austrian Journal of Statistics, 2018, 47 (5), pp.1-25. ⟨10.17713/ajs.v47i5.718⟩
Austrian Journal of Statistics, Vol 47, Iss 5 (2018)

Regression models have been developed for the case where the dependent variable is a vector of shares. Some of them, from the marketing literature, are easy to interpret but they are quite simple and can only be complexified at the expense of a very

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2eb62b0dba2566e07ea2018194d116b9
http://prodinra.inra.fr/record/447106