Gender inequality (GI) still prevails due to multi-faceted reasons. Therefore, multi-dimensional approaches to examine the root-causes of GI are necessary. In this regard, with the adoption of multi-perspectives and multi-level analyses, i.e. macro- vs. micro-analysis (OECD membership, gender, and regions), the study aims to find out the key determinants affecting GI in five different models, comprised of 17 socio-economic and institutional determinants: the capability-related model (CRM), the livelihood-related model (LRM), the formal ...