@unpublished{Gup-06,
title = {The Value of a ``Free'' Customer},
author = {Sunil Gupta and Carl Mela and Jos{\'e} Vidal-Sanz},
note = {http://www.hbs.edu/research/pdf/07-035.pdf},
url = {http://www.hbs.edu/research/pdf/07-035.pdf},
year = {2006},
description = {March 2008},
date-added = {2007-06-11 17:22:07 +0200}, date-modified = {2007-06-11 17:22:06 +0200}, read = {Yes}, rating = {5}, uri = {papers://C3B117CD-23C4-4854-9426-AC96AFB113DA/Paper/p184},
keywords = {CRM; Control; Customer Dynamic Lifetime Optimal Programming Value; }
}
::