http://blogs.computerworlduk.com/open-enterprise/2011/12/open-source-total-cost-of-ownership-20/index.htm This article references a study done by LSE...

http://www.computerworld.com/s/article/9222249/Is_Cloud_Computing_for_You_Five_Points_to_Consider?source=CTWNLE_nlt_wsmgnt_2011-12-01&utm_source=f...