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ERIC Number: ED205534
Record Type: Non-Journal
Publication Date: 1981-Apr
Reference Count: N/A
Specification Bias in Causal Models with Fallible Indicators.
Patteson, Barbara J.; Wolfle, Lee M.
In the bivariate case, measurement error in the independent variable produces an attenuated estimate of the true regression coefficient. In the multivariate case, the bias which results from specifying, incorrectly, a model with no measurement error will produce biased estimates which are predictable in neither their direction nor magnitude. Using data on educational attainment from the National Longitudinal Study of the High School Class of 1972, this paper examines the extent of bias inherent in ordinary least squares regression estimates when the presence of measurement error is ignored. In some cases, the nature of bias can be predicted, but the more usual situation is that measurement error bias is unpredictable. (Author/BW)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Sponsor: National Center for Education Statistics (DHEW), Washington, DC.
Authoring Institution: Virginia Polytechnic Inst. and State Univ., Blacksburg.
Identifiers - Assessments and Surveys: National Longitudinal Study of the High School Class of 1972