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The purpose of this paper is to quantify the impact of social or government transfers on income inequality and poverty in South Africa.

A top-down, bottom-up (TD-BU) model which combines an econometrically estimated labor supply model, a detailed tax-benefit module and a computable general equilibrium model is used in order to analyze the impact of government transfers on income inequality and poverty in South Africa. The paper uses a merged South African income and expenditure household survey and labor force survey for the year 2000, and a South African social accounting matrix as the main data sets.

Simulation results suggest that doubling of government transfers lead to a 5.5 percent reduction in poverty if a relative poverty measure is used and a 7 percent reduction if an absolute poverty line is used. In addition, simulation results show differences in poverty and inequality measures between the MS-only model and the linked TD-BU model confirming the importance of linking the two models.

The TD-BU approach is important since it explicitly accounts for the following aspects: that labor supply should adjust to changes in the tax-benefit model, general equilibrium effects and the heterogeneity of economic agents. This allows for a richer micro-household modeling.