SIGI 2023 Methodology

The Social Institutions and Gender Index (SIGI) is a composite index developed by the OECD Development Centre, serving as a statistical tool to measure the root causes of gender inequality globally. To do so, the SIGI collects and aggregates data on gender-based discrimination in formal and informal laws as well as in social norms. This methodology presents the conceptual and methodological framework of the fifth edition of the SIGI, published in 2023. It describes in detail the various processes employed to collect quantitative and qualitative data, the construction and encoding of the legal, attitudinal and practice variables of the framework, and the aggregation of the different elements of the framework into one single composite measure. Finally, the methodology provides some statistical results of the fifth edition of the SIGI, including by comparing SIGI scores against other major international gender indices.