The Quintile Share Ratio in location analysis
The European Union is using the Quintile Share Ratio (QSR) as a measure of equity. We find the location of one facility that minimizes the QSR of service distances. The solutions to the QSR objective are similar to those of the Gini index objective. Problems with 100,000 demand points were optimally solved in about half a minute.
quintile share ratio equity facility location global optimization