Web and Internet Economics 15th International Conference, WINE 2019, New York, NY, USA, December 10-12, 2019, Proceedings - Caragiannis, Ioannis; Caragiannis, Ioannis; Mirrokni, Vahab; Mirrokni, Vahab; Nikolova, Evdokia; Nikolova, Evdokia (Springer International Publishing : Imprint: Springer, 2019)