The increasing availability of data from multisite randomized trials provides a potential opportunity to use instrumental variables (IV) methods to study the effects of multiple hypothesized mediators of the effect of a treatment. We derive nine assumptions needed to identify the effects of...

This article explores the statistical methodologies used in demonstration and effectiveness studies when the treatments are applied across multiple settings. The importance of evaluating and how to evaluate these types of studies are discussed. As an alternative to standard methodology, the...

This research is based on the conservation of resources theory. It aims to examine the mediator role of relational energy in the effect of supervisor's crab syndrome on employee work effort. This research, focusing on the crab syndrome and relational energy, a new phenomenon in the literature,...

We develop results for the use of LASSO and Post-LASSO methods to form first-stage predictions and estimate optimal instruments in linear instrumental variables (IV) models with many instruments, p, that apply even when p is much larger than the sample size, n. We rigorously develop asymptotic...

It is well known that homeowners are richer than renters, even after controlling for observable characteristics. This is often used as an argument for policies that foster homeownership. However, the causal link between homeownership and wealth is difficult to establish due to many potential...

We evaluate the impacts of a compulsory dialogue meeting for long-term sick-listed workers in Norway. The meeting is organised by the local social security administration after around six months of absence, and its purpose is to bring together the absentee, the employer, and the family physician...

Highly non-elliptical posterior distributions may occur in several econometric models, in particular, when the likelihood information is allowed to dominate and data information is weak. We explain the issue of highly non-elliptical posteriors in a model for the effect of education on income...