Progressive income taxation and consumption baskets of rich and poor

In this paper, I analyze the implications of differences in consumption baskets across income groups to evaluate the effects of redistributive taxation on efficiency and inequality. To this end, I develop a static multi-sector general equilibrium model incorporating a parametric tax function, non-homothetic consumption preferences, and endogenous labor supply, with varying compositions of skilled and unskilled labor in production across sectors. A calibrated version the model captures the cross-sectional differences in the compositions of households' consumption baskets in the United States. I find that considering the differences in consumption baskets between high-and low-income households leads to a lower optimal choice of income tax progressivity compared to the conventional approach that ignores this feature of the data.