The paper "Measuring the Immeasurable: A Survey of Sustainability Indices" by Christoph Böhringer and Patrick Jochem reviews eleven widely used sustainability indices in policy practice, including the Living Planet Index (LPI), Ecological Footprint (EF), City Development Index (CDI), Human Development Index (HDI), Environmental Sustainability Index (ESI), Environmental Performance Index (EPI), Environmental Vulnerability Index (EVI), Index of Sustainable Economic Welfare/Genuine Progress Index (ISEW/GPI), Well-Being Index (WI), Genuine Savings Index (GS), and Environmental Adjusted Domestic Product (EDP). The authors critique these indices for their lack of scientific rigor in three key steps: normalization, weighting, and aggregation. They find that while these indices are intended to be concise and transparent, they often fail to meet fundamental scientific requirements, leading to arbitrary judgments and misleading results. The paper concludes that the current sustainability indices are either useless or potentially misleading for policy advice due to their inherent inconsistencies.The paper "Measuring the Immeasurable: A Survey of Sustainability Indices" by Christoph Böhringer and Patrick Jochem reviews eleven widely used sustainability indices in policy practice, including the Living Planet Index (LPI), Ecological Footprint (EF), City Development Index (CDI), Human Development Index (HDI), Environmental Sustainability Index (ESI), Environmental Performance Index (EPI), Environmental Vulnerability Index (EVI), Index of Sustainable Economic Welfare/Genuine Progress Index (ISEW/GPI), Well-Being Index (WI), Genuine Savings Index (GS), and Environmental Adjusted Domestic Product (EDP). The authors critique these indices for their lack of scientific rigor in three key steps: normalization, weighting, and aggregation. They find that while these indices are intended to be concise and transparent, they often fail to meet fundamental scientific requirements, leading to arbitrary judgments and misleading results. The paper concludes that the current sustainability indices are either useless or potentially misleading for policy advice due to their inherent inconsistencies.