The goal of our paper is to examine differences between the income distributions for men and women in Poland. We use a flexible hazard-function based estimator in the presence of covariates to construct conditional density and cumulative distribution functions. Then we estimate the Lorenz curves for wages. This method allows us to investigate the differences in income inequality for two groups of people. Incorporating the effects of covariates into Lorenz curve ordinate estimates makes it possible to infer the effects of various person's characteristics on the shape of this curve.

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