Rich Ling is a sociologist at Telenor's research institute near Oslo, Norway and has been Pohs Visiting Professor of Communication at the University of Michigan, Ann Arbor. He is the author of New Tech, New Ties: How Mobile Communication is Reshaping Social Cohesion and The Mobile Connection: The Cell Phone's Impact on Society. Scott W. Campbell is assistant professor and Pohs Fellow of Telecommunications in the Department of Communication Studies at the University of Michigan. His research has been published in the journals Communication Education, Communication Monographs, International Journal of Communication, Journal of Applied Communication Research, New Media & Society, and others.