Chetty, Raj; Friedman, John N.; Rockoff, Jonah E. - In: American Economic Review 104 (2014) 9, pp. 2593-2632
Are teachers' impacts on students' test scores ("value-added") a good measure of their quality? One reason this question has sparked debate is disagreement about whether value-added (VA) measures provide unbiased estimates of teachers' causal impacts on student achievement. We test for bias in...