[1] Univ Edinburgh, Sch Informat, Edinburgh EH8 9YL, Midlothian, Scotland
[2] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON M5S 1A1, Canada
[3] McGill Univ, Dept Epidemiol & Biostat, Montreal, PQ H3A 2T5, Canada
[4] IBM Res, Dublin, Ireland
[5] Univ N Texas, Dept Comp Sci & Engn, Denton, TX 76203 USA
[6] CSIRO, Kensington, NSW, Australia
[7] NYU, Ctr Urban Sci & Progress, New York, NY 10003 USA
[8] Georgia Inst Technol, Coll Comp, Atlanta, GA 30332 USA
[9] Univ Penn, Philadelphia, PA 19104 USA
[10] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[11] Carnegie Mellon Univ, Dept Comp Sci, Pittsburgh, PA 15213 USA
[12] Penn State Univ, Informat Sci & Technol, University Pk, PA 16802 USA
[13] Penn State Univ, Dept Comp Sci & Engn, University Pk, PA 16802 USA
[14] Penn State Univ, Dept Supply Chain & Informat Syst, University Pk, PA 16802 USA
[15] Univ Quebec Chicoutimi, Comp Sci, Chicoutimi, PQ, Canada
[16] Univ Alberta, Dept Comp Sci, Edmonton, AB T6G 2M7, Canada
[17] Univ Freiburg, Freiburg, Germany
[18] TU Berlin, Software & Algorithms Discrete Optimizat, Berlin, Germany
[19] Zuse Inst Berlin, Dept Informat Sci, Berlin, Germany
[20] Univ Texas Austin, Austin, TX 78712 USA
[21] Univ Alberta, Edmonton, AB, Canada
[22] IBM Res, Delhi, India
[23] NYU, Psychol & Neurosci, New York, NY 10003 USA
[24] KTH Royal Inst Technol, Stockholm, Sweden
[25] Delft Univ Technol, NL-2600 AA Delft, Netherlands
[26] Univ Padua, Comp Sci, I-35100 Padua, Italy
[27] Univ Calif Berkeley, Sch Publ Hlth, Berkeley, CA 94720 USA
[28] Australian Natl Univ, Comp Sci, Canberra, ACT 0200, Australia
[29] NICTA, Optimisat Res Grp, West Melbourne, Vic, Australia
[30] Carnegie Mellon Univ, Comp Sci, Pittsburgh, PA 15213 USA
[31] NICTA, Melbourne, Vic, Australia
[32] Univ New S Wales, Sydney, NSW, Australia
[33] Nanyang Technol Univ, Sch Comp Engn, Singapore 639798, Singapore
[34] Microsoft Res, Plymouth Meeting, PA USA