This paper estimates wage equations for New Zealand based on pooled data from the Household Economic Survey (HES) from 2006/07 to 2010/11. Equations are estimated separately for couple men and women, single men and women and sole parents. The results are compared to previous New Zealand...

This paper examines whether the quality of learning, measured by the scores obtained by the 1978 generation at the end of high school (1995), affects the wages received by this cohort five years later, measured in the 2000 Census. We compute average wages and proficiency for each...

Due to resource constraints, securities regulators cannot find or punish all firms that have conducted irregular or even illegal activities (hereafter referred to as fraud). Those who study securities regulations can only find the instances of fraud that have been punished, not those that have...

In this paper we discuss two types of selection problems. The first problem is motivated by labor market analyses such as the estimation of sector-specific wage equations where the sector for which the wages are observed are chosen by the agents. In contrast to previous formulations which...

Many empirical studies specify outcomes as a linear function of endogenous regressors when conducting instrumental variable (IV) estimation. We show that commonly used tests for treatment effects, selection bias, and treatment effect heterogeneity are biased if the true relationship is...

Abstract Suppose we are interested in the effect of variable X on variable Y . If X and Y both influence, or are associated with variables that influence, a common outcome, called a collider , then conditioning on the collider (or on a variable influenced by the collider – its “child”)...

Abstract Objectives The Child Health and Mortality Prevention Surveillance (CHAMPS) Network is designed to elucidate and track causes of under-5 child mortality and stillbirth in multiple sites in sub-Saharan Africa and South Asia using advanced surveillance, laboratory and pathology methods....

Abstract Objectives Spurious associations between an exposure and outcome not describing the causal estimand of interest can be the result of selection of the study population. Recently, sensitivity parameters and bounds have been proposed for selection bias, along the lines of sensitivity...

Summary This paper is concerned with the effect of vocational training on individual unemployment duration in West Germany. The data base used in this study is the German Socio-Economic Panel (GSOEP) for West Germany for the period from 1984 to 1994. The econometric model is a semi-parametric...

Abstract The paper provides a simple test for deciding, from a given causal diagram, whether two sets of variables have the same bias-reducing potential under adjustment. The test requires that one of the following two conditions holds: either (1) both sets are admissible (i.e. satisfy the...