Notes
I am grateful to Ray Bush, Caroline Ifeka, and Gary Littlejohn for comments on this editorial.
See: http://data.worldbank.org/indicator/NY.GNP.PCAP.PP.CD?order=wbapi_data_value_2009+wbapi_data_value+wbapi_data_value-last&sort=asc [Accessed 30 November 2010].
Source: http://www.forbes.com/lists/2010/10/billionaires-2010_The-Worlds-Billionaires_Rank.html [Accessed 13 December 2010].