The index can be turned into a normative measure by imposing a coefficient to weight incomes. Greater weight can be placed on changes in a given portion of the income distribution by choosing , the level of "inequality aversion", appropriately. The Atkinson index becomes more sensitive to changes at the lower end of the income distribution as approaches 1. Conversely, as the level of inequality aversion falls (that is, as approaches 0) the Atkinson becomes more sensitive to changes in the upper end of the income distribution.
The Atkinson index is defined as:
where is individual income (i = 1, 2, ..., N) and is the mean income.
Quantifying the Efficiency and Equity Implications of Power Plant Air Pollution Control Strategies in the United States
May 01, 2007; BACKGROUND: In deciding among competing approaches for emissions control, debates often hinge on the potential tradeoffs between...
Research from United States Environmental Protection Agency Reveals New Findings on Respiratory Therapeutics
Apr 27, 2012; New research, "Maximizing health benefits and minimizing inequality: incorporating local-scale data in the design and evaluation...