…cs (QJE) volume 133:1, February 2018. Also appears as NBER Working Paper Number 23180, February 2017. H. Lakkaraju, J. Kleinberg, J. Leskovec, J. Ludwig, S. Mullainathan. The Selective Labels Problem: Evaluating Algorithmic Predictions in the Presence of Unobservables. Proc. 23rd…