Case Studies on Leaving No One Behind

A companion volume to the Development Co-operation Report 2018

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These case studies complement the 2018 Development Co-operation Report: Joining forces to leave no one behind. Case study contributors share knowledge and lessons on what it takes to answer the pledge of the 2030 Agenda for Sustainable Development to leave no one behind through national and sub-national policies, strategies and programmes as well as international development co-operation projects, programmes and partnerships. The insights, good practices and lessons shared in these case studies were provided by diverse actors. These include official development co-operation ministries and agencies from members of the OECD and the Development Assistance Committee, international organisations, developing country governments, civil society organisations, business, and research bodies.


The case studies highlight experiences from projects and programmes in leaving no one behind and reaching the furthest behind. They are organised and presented under two broad categories:

1. Reaching and including people and places;

2. The enabling role of international co-operation: policies, partnerships and data.



A better chance in life for the most vulnerable adolescent girls and boys in Tanzania

The United Republic of Tanzania (“Tanzania”) has a young population. The country is home to 12 million adolescents (10-19 years), and this is expected to grow to 30 million by 2050. Adolescents in Tanzania face many barriers to safe transitions to adulthood, including health-related risks, barriers to schooling, and limited livelihood opportunities. Poverty is a key driver of poor educational opportunities and risks to health, such as early pregnancy, gender-based violence and sexually transmitted infections, including HIV. Findings from a 2018 UNICEF baseline study conducted jointly with the Government of the Republic of Tanzania show that many adolescents from poor households live in particularly vulnerable circumstances, with one in three not living with a parent or guardian, and half of those being double orphans. About two in three households are headed by women, with household heads approximately 60 years old on average.


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