Forecasting Nike's sales using Facebook data. - Linda Camilla Boldt; Vinothan Vinayagamoorthy; Florian Winder; Melanie Schnittger; Mats Ekran; Raghava Rao Mukkamala; Niels Buus Lassen; Benjamin Flesch; Abid Hussain; Ravi Vatrapu (IEEE BigData, 2016)