Interesting work from Raj Chetty, John Friedman, and Jonah Rockoff

The earnings gains from replacing a low value-added (bottom 5%) teacher with one of average quality grow as more data are used to estimate value-added. Discounting future earnings gains to present value, the gains are $190,000 with 3 years of data and eventually surpass $250,000 per class. If future earnings are not discounted, cumulative earnings gains surpass $1.4 million per class.

You should see the three graphs they show on their summary page.

About ozidar

I'm an Assistant Professor of Economics at the University of Chicago Booth School of Business and a Faculty Research Fellow at National Bureau of Economic Research. You can follow me on twitter @omzidar.
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