This is a list of countries by inequality-adjusted human development index (IHDI), as published by the UNDP in its 2015 Human Development Report. According to the 2010 Report, "the IHDI is the actual level of human development (accounting for inequality)" and the unadjusted calculations for the HDI "can be viewed as an index of potential human development (or the maximum IHDI that could be achieved if there were no inequality)". The Human Development Index (HDI) is a composite statistic of life expectancy, education, and per capita income indicators, which are used to rank countries into four tiers of human development. The HDI was developed by Pakistani economist Mahbub ul Haq, is anchored in the Indian Nobel laureate Amartya Sen’s work on human capabilities, often framed in terms of whether people are able to "be" and "do" desirable things in their life, and was published by the United Nations Development Programme.
The index captures the HDI of the average person in society, which is less than the aggregate HDI when there is inequality in the distribution of health, education and income. Under perfect equality, the HDI and IHDI are equal; the greater the difference between the two, the greater the inequality.
The IHDI, estimated for 150 countries, captures the losses in human development due to inequality in health, education and income. Losses in all three dimensions vary across countries, ranging from just a few percent (Czech Republic, Slovenia) up to over 40% (Namibia, Angola). Overall loss takes into account all three dimensions.
The table below ranks countries according to their inequality-adjusted human development index (IHDI) and compares it to their HDI. The "Loss (%)" column, given by the difference between the HDI and the IHDI and expressed as a percentage, indicates the “loss” in potential human development due to inequality. The "Rank change" column reflects a country's rank difference between both HDI and IHDI lists, when only the 132 countries (134 countries in 2011 report) with a calculated IHDI are considered.
All data is based on 2013 and 2011 estimates.