Take a look at:
"Income Inequality in the United States, 1913-1998" with Thomas Piketty, Quarterly Journal of Economics, 118(1), 2003, 1-39 (Longer updated version published in A.B. Atkinson and T. Piketty eds., Oxford University Press, 2007) (Tables and Figures Updated to 2012 in Excel format, September 2013)--the paper that got Emmanuel and his coauthor Thomas Piketty denounced by the Wall Street Journal as "French economists… rock stars of the intellectual left… special[izing in]… 'earnings inequality' and 'wealth concentration'"
UPDATED Summary for the broader public "Striking it Richer: The Evolution of Top Incomes in the United States", updated September 2013
The most important single chart prepared in economics in the past decade, I think, is this one from Piketty and Saez: