Here's a link to the actual paper http://www.haas.berkeley.edu/groups/online_marketing/facultyCV/papers/kray_paper2012.pdf http://www.haas.berkeley.edu/groups/o

Here's a link to the actual paper http://www.haas.berkeley.edu/groups/online_marketing/facultyCV/papers/kray_paper2012.pdf http://www.haas.berkeley.edu/groups/online_marketing/faculty...