Barro, RobertSahasakul, Chaipat2010-01-121986Barro, Robert J., and Chaipat Sahasakul. 1986. Average marginal tax rates from social security and the individual income tax. Journal of Business 59(4): 555-566.0021-9398http://nrs.harvard.edu/urn-3:HUL.InstRepos:3451298We extend previous estimates of the average marginal tax rate from the federal individual income tax to include social security. Our computations consider the tax rates on employers, employees, and the self-employed; the income that accrues to persons with earnings below the ceiling; and the effective deductibility of employers' social security contributions from workers' taxable income. The next effect of social security on the average marginal tax rate is below .02 until 1966 but then rises to .03 in 1968, .04 in 1973, .05 in 1974, .06 in 1979, and .07 in 1982.en-USJournal Article2010-01-1210.1086/296354