1. Industrial Engineering and Operations Research Department, University of California–Berkeley, Berkeley, California 94720;
2. Amazon, Seattle, Washington 98109;
3. Daniel J. Epstein Department of Industrial Systems & Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, California 90089;
4. Mathematical Institute, University of Oxford, Oxford OX2 6GG, United Kingdom;
5. Institute for Computational & Mathematical Engineering, Stanford University, California 94305