Moshe Adler, professor of economics at Columbia University, has emerged as one of the most incisive critics of the work of Raj Chetty, John Friedman, and Jonah Rockoff on Value-added measurement (VAM).
In the recent Vergara decision about tenure for teachers in California, the study by Raj Chetty and John Friedman of Harvard and Jonah Rockoff of Columbia played a prominent role. But according to the economist Moshe Adler the study is wrong and misleading. According to Adler, the authors suppressed a result that contradicts their main claim, they picked and chose which data sets to use, they used a misleading method of analysis that inflated their results and they misrepresented research that contradicts their claims as supporting them. These are just a few of the problems with the scientific integrity with the study. Adler wrote his review for the National Education Policy Center and it can found at: http://nepc.colorado.edu/newsletter/2014/06/adler-response-to-chetty)
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