It is a common misperception that low teacher recruitment is the cause of the current teacher shortage in the United States. Research over the past decade suggests, however, that the source of the shortage is high levels of staffing fluctuations driven by teacher attrition. This paper examines the factors underlying teacher attrition decisions in order to make policy recommendations about which...

BACKGROUND Medical researchers often use longitudinal observational studies to examine how risk factors predict change in health over time. Selective attrition and inappropriate modeling of regression toward the mean (RTM) are two potential sources of bias in such studies. METHOD The current study used Monte Carlo simulations to examine bias related to selective attrition and inappropriate mo...

Our case study confirms two previous studies demonstrating that a ‘lost’ language can be recovered by hypnosis. These results point to the existence of another type of attrition. Here a distinction is made between this type of attrition of a ‘hidden language’ (HL), that is, one that has not been forgotten but rather has become inaccessible to the speaker, and the traditionally studied attrition...

Background. Attrition is a major cause of potential bias in longitudinal studies and clinical trials. Attrition rate above 20% raises concern of the reliability of the results. Few studies have looked at the factors behind attrition in follow-ups spanning decades. Methods. We analyzed attrition and associated factors of a 30-year follow-up cohort of subjects who were born with perinatal risks f...

Our case study confirms two previous studies demonstrating that a ‘lost’ language can be recovered by hypnosis. These results point to the existence of another type of attrition. Here a distinction is made between this type of attrition of a ‘hidden language’ (HL), that is, one that has not been forgotten but rather has become inaccessible to the speaker, and the traditionally studied attrition...

BACKGROUND Analyzing drop out rates and when they occur may give important information about the patient characteristics and trial characteristics that affect the overall uptake of an intervention. METHODS We searched Medline and the Cochrane library from the beginning of the databases to May 2006 for published systematic reviews that compared the effects of self-monitoring (self-testing) or ...

BACKGROUND High retention rates have been documented among patients receiving antiretroviral therapy (ART) in Myanmar. However, there is no information on human immunodeficiency virus (HIV)-infected individuals in care before initiation of ART (pre-ART care). We assessed attrition (loss-to-follow-up [LTFU] and death) rates among HIV-infected individuals in pre-ART care and their associated fact...

We examine the importance of possible non-random attrition to an econometric model of life cycle labor supply including joint nonlinear taxation of wage and interest incomes and latent heterogeneity. We use a Wald test comparing attriters to nonattriters and variable addition testing based on formal models of attrition. Results from the Panel Study of Income Dynamics are that non-random panel a...

An Analysis of Sample Attrition in Panel Data: Michigan Panel Study of Income Dynamics By 1989 the Michigan Panel Study on Income Dynamics (PSID) had experienced approximately 50 percent sample loss from cumulative attrition from its initial 1968 membership. We study the effect of this attrition on the unconditional distributions of several socioeconomic variables and on the estimates of severa...