1. Berry, C.J. (1994), The Idea of Luxury: A Conceptual and Historical Investigation, Cambridge University Press, Cambridge.
2. Census Bureau (2001), Money Income in the United States: 2000, Current Population Reports, US Government Printing Office, Washington, DC.
3. Census Bureau (2003), “Income 2003”, available at: www.census.gov/hhes/www/income/income03/statemhi.html.
4. Danziger, P.N. (2002), Why People Buy Things They Don't Need, Paramount Market Publishing, Ithaca, NY.
5. Frank, R.H. (1999), Luxury Fever, The Free Press, New York, NY.