Investigate the distribution of income in the United States from the 1960's. The Bureau of Labor Statistics (bls.gov)or the US census government website census.gov may be good sites.
Pick one of the following questions to address - if all the questions have been taken - verify the numbers of your fellow students and offer a variation of perspectives. Or choose your own related question to answer regarding the distribution of income issue.
How has income distribution changed over the years and present your findings.
Why you think it has evolved the way it has?
Does this need to be addressed and how?
How does the US compare with other countries?
Is wealth distribution and income distribution the same thing?
Are the rich getting richer and the poor getting poorer?
Are the rich staying rich or is there a steady movement in and out of the ranks of the rich.
What does it take to be in the top quintile of earners in the US (cut offs for the other quintiles)?