^[1] http://www.ucsusa.org/publications/guide.ch1.html

^[2] http://www.acjournal.org/holdings/vol2/Iss3/articles/Online_Shopping.htm; http://www.docstoc.com/docs/7069364/ANALYZING-E-COMMERCE-GROWTH-FROM-THE-PERSPECTIVES-OF-INNOVATION-DIFFUSION

^[3] http://www.nytimes.com/1998/07/30/technology/security-fears-still-plague-cybershopping.html

^[4] http://www.bizreport.com/2010/06/forecast-by-2015-online-ads-to-surpass-110-billion.html#

^[5] http://www.comscore.com/Press_Events/Press_Releases/2010/8/comScore_Reports_Q2_2010_U.S._Retail_E-Commerce_Spending_Up_9_Percent_vs._Year_Ago

^[6] http://www.bizreport.com/2010/06/forecast-by-2015-online-ads-to-surpass-110-billion.html#

^[7] http://www.gaebler.com/Direct-Mail-Response-Rates.htm

^[8] http://index.fireclick.com/

^[9] http://www.internetretailer.com/2007/06/26/lane-bryant-catalog-site-tops-online-retailers-in-conversion-rat

^[10] http://index.fireclick.com/

^[11] http://www.marketingcharts.com/direct/top-10-online-retailers-by-conversion-rate-march-2010-12774/

^[12] http://index.fireclick.com/

^[13] http://www.comscore.com/Press_Events/Press_Releases/2007/07/Yahoo!_and_comScore_Online_Consumer_Study