This document discusses key concepts related to human development, including definitions of human development index (HDI), Gini index, and inequality-adjusted HDI. It provides details on how each index is calculated and the dimensions they measure. HDI considers life expectancy, education, and income levels to evaluate average achievement in a country, while IHDI further accounts for inequality. The Gini index measures income or wealth distribution within a country from 0 (perfect equality) to 1 (perfect inequality). The document also presents data on Mexico's HDI, IHDI, and Gini index.