Exposure assessment in epidemiological studies remains as a key bias domain, prompting for reliable and accurate methods reflecting the true individual exposure. For that reason, use of exposure biomarkers has become gold-standard method environmental chemicals food contaminants epidemiology. In last few years, growing list biomonitoring revealed widespread population to mycotoxins, mainly afla...

This article uses the post-Katrina migration as an exogenous shock to test theories of racial threat while minimizing concerns about selection bias. Drawing in part on a new survey of 3,879 respondents, it demonstrates that despite the national concern about issues of race and poverty following Katrina, people in communities that took in evacuees became less supportive of spending to help the p...

Motivated by the empirical findings concerning the importance of one’s current situation on her choice behavior, the main objective of this paper is to propose a rational choice theory that allows for the presence of a status quo bias, and that incorporates the standard choice theory as a special case. We follow a revealed preference approach, and obtain two nested models of rational choice tha...

In this paper we examine whether homeowning benefits children by testing whether children of homeowners stay in school longer than children of renters and whether daughters of homeowners are less likely to have children as teenagers than daughters of renters. We use both probit models and a bivariate probit technique which takes account of possible selection bias due to differences between pare...

This paper studies the effects of land use consolidation on consumption growth of farm households in Rwanda. Data on 1 920 households, observed in two time periods, are used to estimate a first-differenced model using an instrumental variables estimator, which allow the analysis to account for selection bias and placement effects. Results show no significant effect of land use consolidation on ...

This paper examines the importance of labor market dropouts and selection bias in assessing black-white wage convergence by introducing a simple method of imputing wages to nonworkers. When nonworkers are included in the calculations, it is found that real wages of prime age black males increased less than 2 percent over the 1969-96 period in contrast to 9 percent wage growth observed among wor...

Background: Selection bias arises in clinical trials by reason of selective assignment of patients to treatment groups. Even in randomized clinical trials with allocation concealment this phenomenon can occur if future assignments can be predicted due to knowledge of former allocations. Objectives: Considering unmasked randomized clinical trials with allocation concealment the impact of selecti...

BACKGROUND The performance of the Cockcroft-Gault (CG) equation, the Modification of Diet in Renal Disease (MDRD) formula, and the Chronic Kidney Disease Epidemiology Collaboration equation (CKD-EPI) was evaluated in body mass index (BMI) categories. MATERIAL AND METHODS In this retrospective cohort study in diabetic patients, creatinine clearance was measured by collecting 24-hour urines. Re...

Spatial modeling of air pollution exposures is widespread in air pollution epidemiology research as a way to improve exposure assessment. However, there are key sources of exposure model uncertainty when air pollution is modeled, including estimation error and model misspecification. We examine the use of predicted air pollution levels in linear health effect models under a measurement error fr...