Ulrike Gretzel Editor & Author

Ulrike Gretzel is a Visiting Professor in the Annenberg School of Communication and Journalism at the University of Southern California. She received her PhD in Communication from the University of Illinois in Urbana-Champaign. Her research focuses on persuasion in human-computer interaction, social media, technology adoption, intelligent system design and smart tourism.

Marianna Sigala is a Professor at the University of South Australia. Her interests include service management, Information and Communication Technologies (ICT) in tourism and hospitality, and e-learning. She is currently the editor of the Journal of Service Theory & Practice and the Journal of Hospitality & Tourism Cases. She is a past President of EuroCHRIE and has served on the Board of Directors of I-CHRIE, IFITT and HeAIS.