lars lefgren

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CLOSUP Lecture Series

Value-Added with Multidimensional Teacher Ability

Mar 7, 2012, 4:00-5:30 pm EST
Gerald R. Ford School of Public Policy Paul and Nancy O'Neill Classroom
Abstract We examine the theoretical and practical implications of ranking teachers according to a one dimensional value-added metric when teacher effectiveness is multi-dimensional. In particular, we consider the cases in which teachers teach multiple subjects or multiple student types. We outline the assumptions under which a standard value-added estimator correctly ranks teachers according to their social value. We demonstrate that these assumptions fail to hold empirically.
Ford School
EPI Working papers

The Persistence of Teacher-Induced Learning Gains

June 1, 2008
Brian Jacob, Lars Lefgren, David Sims
Educational interventions are often narrowly targeted and temporary, and evaluations often focus on the short-run impacts of the intervention. Insofar as the positive effects of educational interventions fadeout over time, however, such assessments...
EPI Working papers

The Effect of Grade Retention on High School Completion

October 1, 2007
Brian Jacob, Lars Lefgren
Low-achieving students in many school districts are retained in a grade in order to allow them to gain the academic or social skills that teachers believe are necessary to succeed academically. This practice is highly controversial, with many...
Other reports

When Principals Rate Teachers

March 1, 2006
Brian Jacob, Lars Lefgren
Elementary- and secondary-school teachers in the United States traditionally have been compensated according to salary schedules based solely on experience and education. Concerned that this system makes it difficult to retain talented teachers and...