Attrition Bias
نویسندگان
چکیده
منابع مشابه
Assessing Attrition Bias – Addendum
A. INTRODUCTION This document serves as an addendum to the existing attrition white paper (“Assessing Attrition Bias” version 2.1) previously used for the WWC Procedures and Standards Handbook, version 2.1. This document does not recommend any substantive changes to the version 2.1 attrition bounds. Instead, this addendum presents additional empirical information and sensitivity analyses to sup...
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This paper summarizes the major findings from a nonresponse bias analysis of the Early Childhood Longitudinal Study, Kindergarten Class of 1998-99 (ECLS-K) first grade data. The analysis examines the potential for bias in estimates from the ECLS-K due to attrition (nonresponse) between the base year (rounds 1 and 2) and first grade (rounds 3 and 4). This work builds on a base year nonresponse b...
متن کاملAttrition in the Kwazulu Natal Income Dynamics Study, 1993-1998
Panel (or longitudinal) data often provide an understanding of the dynamic behavior of individual households not possible with cross-sectional or time-series information alone. However, a disturbing feature of this type of survey in both developed and developing countries is that there is often substantial, nonrandom attrition. Therefore, an important concern is the extent to which attrition in...
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It is well known that non-random attrition can lead to bias in estimating treatment effects from a social experiment that is based on random assignment. If the randomized intervention suffers from non-random attrition, the intent to treat (ITT) estimator is biased and the IV estimator of the treatment effect is also inconsistent (Frangakis and Rubin 1999). DiNardo, McCrary and Sanbonmatsu (2006...
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