Executive summary The objective of this article is to identify institutional quality dimensions that can improve the health of populations in Sub-Saharan Africa (SSA). Identifying the institutional quality that improves health is important because it can enable African policymakers who often have limited resources to focus on a few key components of this institutional quality to improve health in their countries. Health variables used in this research are life expectancy at birth, under-five mortality rate and maternal mortality ratio. In the context of achieving the United Nations Sustainable Development Goals (SDGs), the African Union (AU) Agenda 2063 and national development plans, the governments of African countries have made improving the health of their populations a priority economic policy objective. For example, in SDGs, the peoples of the United Nations aspire to good health and well-being. Goal 3 aims to enable all people to live in good health and to promote the well-being of all people at all ages (United Nations, 2015). Through Agenda 2063, the peoples of Africa aspire to a high standard of living and quality of life, good health and well-being by 2063 (African Union Commission, 2015). However, the achievement of these goals and aspirations requires the implementation of adequate health policies. It requires knowledge and understanding of the mechanisms that explain the formation of health capital. Analysing to identify these mechanisms, examining them to understand them and explaining them through the lens of institutional quality is the main concern of this article. In this work, we hypothesize that better quality of economic and political institutions improves the health of populations in SSA and that some institutional dimensions are more relevant than others. The institutional quality is integrated into Grossman's (2000) health production function and adapted for the context. This function is estimated using the World Bank's World Development Indicators (WDI) and Worldwide Governance Indicators (WGI) on a sample of 45 countries in SSA. 2SLS estimation techniques are used to take into account endogeneity problems related to institutional quality, health and other variables and also measurement errors in these variables. Very few studies have attempted to analyse the role of institutional quality on health outcomes in SSA. In most cases, the existing body of work focuses on developing countries in general. 3 Those who studied the role of institutional quality have often limited themselves to a single dimension of these institutions. Our study aims to use several dimensions of institutional quality. The aim is to investigate whether some of these dimensions are more relevant than others in explaining health outcomes in SSA. This study contributes to the literature by (i) using six institutional quality indicators to analyse the role of institutional quality on health outcomes; (ii) adopting a specification based on a theoretical model and an estimation method that takes into account the endogeneity issues associated mainly with institutional quality and health outcomes (iv) covering a sample of 45 sub-Saharan African countries observed over a relatively long period from 1996 to 2018. Our robust results show that institutional quality that foster health outcomes in SSA are in order rule of law, control of corruption, government effectiveness, voice and accountability, and political stability and absence of violence. In order to improve health in SSA, decision-makers should, for example, in the area of child health, focus on prevention through vaccination and improved nutrition. For children who are already sick, they should put in place policies that promote the accurate identification of children's illnesses, ensure appropriate and combined treatment for all major illnesses, strengthen counselling for caregivers and speed up the referral process for seriously ill children. They should also improve the case management skills of healthcare workers and adequately expand healthcare facilities. Indeed, at the time of birth, a child's chances of survival are likely to increase significantly if it is delivered in the presence of a skilled attendant and in a health facility. Providing free child health care so that all African children can benefit from interventions or treatment in case of illness can save many lives. Skilled care during pregnancy, childbirth and the postpartum period can make the difference between a mother's life and death. For example, a severe haemorrhage in the third stage of labour can kill a healthy woman in two hours without care. An oxytocin injection given immediately after delivery is very effective in reducing the risk of haemorrhage. Women should receive care from trained health professionals such as doctors, nurses and midwives. They must be able to access health facilities geographically, which means that public officials must build health facilities wherever they are needed. Means of transport such as ambulances 4 must be accessible. Similarly, medicines or emergency products such as blood for rapid blood transfusion must be available. Post-partum care is also of crucial importance. It enables medical personnel to ensure that the mother and child are well and, if not, to detect and treat any postpartum problems at an early stage. It also enables medical professionals to promote healthy health behaviours such as breastfeeding and good nutrition, provide hygiene and immunization recommendations, and offer family planning and other reproductive health services. Quality maternal health care before, during and after childbirth should also be free of charge in all countries of the region. The publication of report cards on the performance of local health facilities can also be important. Indeed, it can spur communities to press for reform of health service delivery and thus force governments to be more effective. It can also persuade health workers to be regularly available to their patients. In terms of political stability and violence, these governments can reduce economic and social inequalities that cause uncertainty and political instability and generally lead to particularly damaging effects on the health of populations. Other factors explaining the formation of health capital imply that public officials should also increase access to electricity and the level of development of their countries in order to improve health status. Universal access to primary education can also improve the health status of populations. Rural populations should not be left out of the picture. To this end, inequalities in access to health care between rural and urban areas must be reduced or even eliminated. The level and efficiency of current health expenditure should also be increased.