Semi-parametric inference on Gini indices of two semi-continuous populations under density ratio models
密度比模型下两个半连续总体基尼指数的半参数推断
Summary The Gini index is a popular inequality measure with many applications in social and economic studies. This paper studies semi-parametric inference on the Gini indices of two semi-continuous populations. We characterise the distribution of each semi-continuous population by a mixture of a discrete point mass at zero and a continuous skewed positive component. A semi-parametric density ratio model is then employed to link the positive components of the two…