Mixed methods research sadly lost a giant in the field and the co-editor in chief of JMMR with
the passing of Mike Fetters of the University of Michigan on July 16th, 2023. Mike lost his …

In causal inference, matching is one of the most widely used methods to mimic a
randomized experiment using observational (non-experimental) data. Ideally, treated units …

Abstract Randomized Controlled Trials (RCTs) are a widely used research protocol in
applied research. Among others, a major challenge of RCTs is the presence of missing data …

We consider the mean prediction error of a classification or regression procedure as well as
its cross-validation estimates, and investigate the variance of this estimate as a function of …

T. Longford. Making decisions is an important action in everyone's lives, and statistics can
help us to provide the options for making a better decision depending on the limited …

Randomized trials involving independent and paired observations occur in many areas of
health research, for example in paediatrics, where studies can include infants from both …

The analysis of low dimensional factorial designs with possible interactions is a relevant
issue. Instead of the common pre-tests for interaction, a simultaneous inference procedure of …

There is a growing concern in science about the extent to which it is reproducible. In
biomedical studies, for example, the strain of organism or conditions in the lab can have …

Conventional experiment designs have a fixed sample size: observations are collected until
the planned sample size is reached, and then the experiment is concluded. Alternatively …

Essays in multiple comparison testing Essays in multiple comparison testing Abstract This
dissertation aims to introduce a level of confidence in multiple inference into econometric …