Taxes and the Economy: An Economic Analysis of the Top Tax Rates Since 1945 - http://graphics8.nytimes.com/news/business/0915taxesandeconomy.pdf "The results of the analysis suggest that changes over the past 65 years in the top marginal tax rate and the top capital gains tax rate do not appear correlated with economic growth. The reduction in the top tax rates appears to be uncorrelated with saving, investment, and productivity growth. The top tax rates appear to have little or no relation to the size of the economic pie. However, the top tax rate reductions appear to be associated with the increasing concentration of income at the top of the income distribution"
