A skilful negotiator can save a lot of money when shopping in his favorite store. This was found out by researchers at the Ruhr-Universität Bochum in a large-scale study. An extra five percent discount is, on average, no problem -- as long as you know how to use your customer loyalty as a trump.
Fuente : http://www.eurekalert.org/pub_releases/2013-02/rb-...
Fuente : http://www.eurekalert.org/pub_releases/2013-02/rb-...