Abstract We introduce the Robust Logistic Zero-Sum Regression (RobLZS) estimator, which can be used for a two-class problem with high-dimensional compositional covariates. Since log-contrast model is employed, estimator able to do feature selection among parts. The proposed method attains robustness by minimizing trimmed sum of deviances. A comparison performance RobLZS non-robust counterpart a...

Due to their type of mathematical construction, the use standard financial ratios in studies analysing health a group firms leads series statistical problems that can invalidate results obtained. These are originated by asymmetry ratios. The present article justifies new methodology using compositional data (CoDa) analyse statements sector, improving analyses conventional since enables techniqu...

The development of John Aitchison’s approach to compositional data analysis is followed since his paper read the Royal Statistical Society in 1982. logratio approach, which was proposed solve problematic aspects working with a fixed-sum constraint, summarized and reappraised. It maintained that properties on this originally built, main one being subcompositional coherence, are not required be s...