A Comparison of Growth Percentile and Value-Added Models of Teacher Performance
AbstractSchool districts and state departments of education frequently must choose between a variety of methods to estimating teacher quality. This paper examines under what circumstances the decision between estimators of teacher quality is important. We examine estimates derived from growth percentile measures and estimates derived from commonly used value-added estimators. Using simulated data, we examine how well the estimators can rank teachers and avoid misclassification errors under a variety of assignment scenarios of teachers to students. We find that growth percentile measures perform worse than value-added measures that control for prior year student test scores and control for teacher fixed effects when assignment of students to teachers is nonrandom. In addition, using actual data from a large diverse anonymous state, we find evidence that growth percentile measures are less correlated with value-added measures with teacher fixed effects when there is evidence of nonrandom grouping of students in schools. This evidence suggests that the choice between estimators is most consequential under nonrandom assignment of teachers to students, and that value-added measures controlling for teacher fixed effects may be better suited to estimating teacher quality in this case.
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Bibliographic InfoPaper provided by Institute for the Study of Labor (IZA) in its series IZA Discussion Papers with number 7973.
Length: 42 pages
Date of creation: Feb 2014
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Find related papers by JEL classification:
- I20 - Health, Education, and Welfare - - Education - - - General
- J08 - Labor and Demographic Economics - - General - - - Labor Economics Policies
- J24 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Human Capital; Skills; Occupational Choice; Labor Productivity
- J45 - Labor and Demographic Economics - - Particular Labor Markets - - - Public Sector Labor Markets
This paper has been announced in the following NEP Reports:
- NEP-ALL-2014-03-01 (All new papers)
- NEP-EDU-2014-03-01 (Education)
- NEP-URE-2014-03-01 (Urban & Real Estate Economics)
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