Disease Burden: Endemic diseases (e.g., malaria, HIV) increase mortality and strain health budgets.
Urbanisation: Concentrated urban populations can benefit from economies of scale in service delivery, but may also face overcrowding.
5. Impact on Economic Performance
Improved health leads to:
Higher labour productivity – healthier workers can work longer hours with fewer sick days.
Greater human capital – children who survive infancy and receive nutrition perform better in school, enhancing future earnings.
Reduced health‑related poverty – lower out‑of‑pocket expenses keep households from falling into poverty.
Conversely, poor health can depress growth by increasing the dependency ratio and diverting resources from investment to treatment.
6. Simple Economic Relationship
The relationship between health expenditure and life expectancy can be expressed in a basic form:
\$\Delta LE = \alpha + \beta \times \ln(HE) + \varepsilon\$
where \$LE\$ is life expectancy, \$HE\$ is health expenditure per capita, \$\alpha\$ and \$\beta\$ are parameters, and \$\varepsilon\$ is the error term.
7. Case Study Summary: Japan vs Nigeria
Japan enjoys a life expectancy of 84.5 years, low infant mortality, and universal health coverage funded by a high‑income economy. The health system emphasises preventive care and has a dense network of hospitals.
Nigeria faces a life expectancy of 55 years and high infant mortality. Limited fiscal capacity, inadequate infrastructure, and a high burden of communicable diseases constrain health outcomes.
These contrasting examples illustrate how income, policy choices and disease environments shape healthcare performance and, consequently, economic development.
Suggested diagram: A flowchart showing how improved healthcare → higher labour productivity → increased GDP per capita → further investment in health.