1. Carroll School of Management, Boston College, Chestnut Hill, Massachusetts 02467;
2. MIT Operations Research Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142;
3. Sloan School of Management, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139;
4. The Wharton School, University of Pennsylvania, Philadelphia, Pennsylvania 19104;
5. Google Inc., Mountain View, California 94043
6. IBM Research, Cambridge, Massachusetts 02142
7. MIT-IBM Watson Artificial Intelligence Laboratory, Cambridge, Massachusetts 02142