Gender and Adolescence: Global Evidence (GAGE) is a nine-year (2015-2024) mixed methods longitudinal research and evaluation study. It follows the lives of 20,000 adolescents in six low- and middle-income countries in Africa (Ethiopia and Rwanda), Asia (Bangladesh and Nepal) and the Middle East (Jordan and Lebanon). GAGE is generating evidence on ‘what works’ to enable adolescent girls and boys to emerge from poverty and fast-track social change for young people, their families and communities. It aims to explore what strategies are most effective in transforming girls’ and boys’ lives at specific junctures in adolescence. The GAGE consortium, managed by the Overseas Development Institute (ODI), includes 35 partner organisations from around the world known for their expertise in research, policy and programming in the fields of adolescence, gender and social inclusion. GAGE is funded by UK aid from the UK government.