Columbia Economist Says Chetty, Friedman, and Rockoff Are Wrong About VAM

29 Jul

More on the Value Added controversy.

Diane Ravitch's blog

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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