Concentration indices are frequently used to measure inequality in one variable over the distribution of another. Most commonly, they are applied to the measurement of socioeconomic-related inequality in health. We introduce a user-written Stata command conindex which provides point estimates and standard errors of a range of concentration indices. The command also graphs concentration curves (and Lorenz curves) and performs statistical inference for the comparison of inequality between groups. The article offers an accessible introduction to the various concentration indices that have been proposed to suit different measurement scales and ethical responses to inequality. The command's capabilities and syntax are demonstrated through analysis of wealth-related inequality in health and healthcare in Cambodia.

中文翻译：

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conindex：浓度指数的估计。

集中指数通常用于衡量一个变量在另一个变量的分布上的不平等。最常见的是，它们被用于衡量健康方面与社会经济相关的不平等。我们介绍了一个用户编写的Stata命令conindex，它提供了点估计值和一系列浓度指标的标准误差。该命令还可以绘制浓度曲线（和洛伦兹曲线）并进行统计推断，以比较组之间的不平等。本文提供了针对各种浓度指数的易于理解的介绍，这些浓度指数已被提出以适合不同的测量规模和对不平等的伦理反应。该命令的功能和语法通过对柬埔寨健康和医疗保健领域与财富相关的不平等现象的分析得到证明。