Gender and Adolescence: Global Evidence (GAGE) is a ten-year (2015-2025) research programme, funded by UK Aid from the UK Foreign, Commonwealth and Development Office (FCDO), that seeks to combine longitudinal data collection and a mixed-methods approach to understand the lives of adolescents in particularly marginalized regions of the Global South, and to uncover 'what works' to support the development of their capabilities over the course of the second decade of life, when many of these individuals will go through key transitions such as finishing their education, starting to work, getting married and starting to have children.GAGE undertakes longitudinal research in seven countries in Africa (Ethiopia, Rwanda), Asia (Bangladesh, Nepal) and the Middle East (Jordan, Lebanon, Palestine). Sampling adolescent girls and boys aged between 10‐19‐year olds, the quantitative survey follows a global total of 18,000 adolescent girls and boys, and their caregivers and explores the effects that programme have on their lives. This is substantiated by in‐depth qualitative and participatory research with adolescents and their peers. Its policy and legal analysis work stream studies the processes of policy change that influence the investment in and effectiveness of adolescent programming.Further information, including publications, can be found on the Overseas Development Institute GAGE website.  Gender and Adolescence: Global Evidence: Ethiopia Round 3, 2021-2022 extends the GAGE quantitative research in Ethiopia for a third round. A sample of more than 8,500 adolescent boys and girls was sought, including nearly 6,200 adolescents surveyed in an earlier round as well as approximately 2,300 new adolescents. The main purpose of this survey was to gather information on the lives of Ethiopian adolescents living in urban and rural locations in the Amhara and Oromiya regions, to understand their changing lives and challenges. At the time of data collection, adolescents were primarily aged 11-20. The sample includes both randomly and purposefully sampled adolescents. The current data release includes information for the subset of individuals who are not part of an ongoing randomised evaluation of adolescent-centric programming. A total of 2,770 adolescent surveys are included in the current release. The Core Respondent (CR) dataset contains information on the focal adolescent's household, including information about key household members, household assets, and dwelling characteristics, as well as information about the focal adolescent her/himself.