Tools often used around the world to measure inequality, such as the Gini index, can act in unexpected ways in certain situations. This is highlighted by economists F. A. Cowell and E. Flachaire.
Two articles by Stéphane Benveniste (University of Paris 1, CES, AMSE) and Marc Sangnier (Aix-Marseille University, AMSE) published in VoxEU (CEPR) and The Conversation.