The concept of the demographic dividend

The demographic dividend refers to a period of economic growth potential that arises when a population has a higher proportion of working-age adults compared to dependents (children and elderly). This shift typically occurs when fertility rates fall, reducing the number of children, while a large cohort of young people enters adulthood, boosting the workforce.

Key features of the demographic dividend

• Declining fertility rates - As families gain confidence that more children will survive infancy and childhood, they tend to have fewer children.
• Increased adult population - The proportion of adults in the population grows as previous large cohorts of children mature into working age.
• Economic potential - This shift creates an opportunity for faster economic development if the conditions to employ and support the growing workforce are met.

The benefits of the demographic dividend for economic growth

When a country experiences a demographic dividend, several social and economic advantages can emerge, provided the economy can absorb the increased labour force. These benefits contribute to a cycle of growth and improved living standards.

Advantages of a growing working-age population

• Expanded labour supply - A larger number of working-age individuals can contribute to the economy, but this depends on the availability of jobs to employ them.
• Higher savings rates - With fewer dependents to support, individuals and families can save more money, which can be invested in economic activities.
• Improved health and family dynamics - Lower fertility rates often lead to healthier women and reduced economic and social pressures at home, allowing families to focus resources on fewer children.
• Better educational outcomes - With fewer children per family, parents can invest more in each child's education and health, leading to a more skilled future workforce.
• Increased consumer spending - Rising incomes per person and a lower dependency ratio boost domestic demand, driving economic growth through greater consumption.

The challenges after the demographic dividend

The demographic dividend is not a permanent state. As the population ages, the advantages can turn into challenges, creating new economic and social pressures for future generations.

Issues arising from an ageing population

• Rising dependency ratio - After the dividend period, the proportion of elderly dependents increases as the large working-age cohort retires, placing a burden on the smaller, younger generation.
• Economic liability - The demographic dividend can become a drawback if the economy struggles to support a growing elderly population, as seen in countries like Japan where younger workers face significant challenges caring for older generations.
• Need for policy adjustments - Governments must plan for increased healthcare and pension costs, alongside strategies to maintain economic productivity with a shrinking workforce.

South Korea's experience with the demographic dividend

South Korea provides a compelling example of how the demographic dividend can drive rapid economic progress when supported by effective policies. Between 1960 and 1990, the country transitioned from high to low fertility rates, creating conditions for significant growth.

Strategies behind South Korea's success

• Fertility reduction - From 1950 to 1975, the average number of children per woman dropped from 5.7 to 3.1, and by 2017, it had fallen further to 1.2, reflecting a dramatic demographic shift.
• Investment in family planning - The government established health centres offering a range of services, including family planning, with a goal of 48% of married couples adopting these methods.
• Focus on education - During the 1950s and 1960s, South Korea shifted towards universal schooling, equipping the population with essential skills for economic development.
• Economic and infrastructure policies - Alongside population control, the government invested heavily in manufacturing and infrastructure, creating job opportunities for the growing workforce.
• Outcome of combined efforts - This holistic approach enabled South Korea to capitalise on its demographic dividend, transforming it into one of the world's leading economies.

Population structure changes using South Korea's population pyramids

Population pyramids are graphical representations of a country's age and sex distribution, offering insight into demographic trends over time. South Korea's population pyramids for 1950, 1979, and 2020 illustrate the dramatic shifts associated with the demographic dividend and its aftermath.

Evolution of South Korea's population structure

• 1950 pyramid - Expansive shape - This pyramid shows a wide base and narrow top, indicating a high birth rate and a predominantly young population with many children and few elderly.
• 1979 pyramid - Transition phase - The base begins to narrow compared to the middle age groups, reflecting declining fertility rates. The largest cohorts are in the 10-19 age range, showing the youth bulge moving into working age.
• 2020 pyramid - Constrictive shape - A beehive-shaped pyramid emerges with a very narrow base due to low birth rates, a bulge in the middle-aged groups (45-59), and a wider top indicating an ageing population with more elderly dependents.

Implications of pyramid changes

• Youth bulge to workforce - The shift from 1950 to 1979 highlights how a large young population entered the workforce, driving the demographic dividend.
• Ageing population challenge - By 2020, the constrictive shape signals a shrinking workforce and growing elderly population, illustrating the post-dividend challenges of a higher dependency ratio.
• Policy needs - These changes underscore the importance of adapting economic and social policies to address both the opportunities of a demographic dividend and the subsequent pressures of an ageing society.