On the Accuracy of Influence Functions for Measuring Group Effects 2019 inproceedings koh2019influence Authors Pang Wei Koh, Kai-Siang Ang, Hubert H. K. Teo, Percy Liang Venue Advances in Neural Information Processing Systems URL https://proceedings.neurips.cc/paper/2019/hash/a78482ce76496fcf49085f2190e675b4-Abstract.html