activity
20122025
most citedA method for Bayesian regression modelling of composition data

10 citations · 13 across the 5 of their papers we have counts for

collaborators

5 papers

stat.ME2025

Addressing outliers in mixed-effects logistic regression: a more robust modeling approach

Divan A. Burger, Sean van der Merwe, Emmanuel Lesaffre

This study introduces an outlier-robust model for analyzing hierarchically structured bounded count data within a Bayesian framework, utilizing a logistic regression approach imple…

stat.AP2018★ 2 cited

Bayesian Extreme Value Analysis of Stock Exchange Data

Sean van der Merwe, Darren Steven, Martinette Pretorius

The Solvency II Directive and Solvency Assessment and Management (the South African equivalent) give a Solvency Capital Requirement which is based on a 99.5% Value-at-Risk (VaR) ca…

stat.ME2018★ 10 cited

A method for Bayesian regression modelling of composition data

Sean van der Merwe

Many scientific and industrial processes produce data that is best analysed as vectors of relative values, often called compositions or proportions. The Dirichlet distribution is a…

math.ST2018

Bayesian Fitting of Dirichlet Type I and II Distributions

Sean van der Merwe, Daan de Waal

In his 1986 book, Aitchison explains that compositional data is regularly mishandled in statistical analyses, a pattern that continues to this day. The Dirichlet Type I distributio…

cs.DL2012★ 1 cited

An empirical study to order citation statistics between subject fields

J. Martin van Zyl, Sean van der Merwe

An empirical study is conducted to compare citations per publication, statistics and observed Hirsch indexes between subject fields using summary statistics of countries. No distri…