IB Geography 1.3.3 the Demographic Dividend and Population as a Resource Notes

The Demographic Dividend: The Window That Falling Fertility Opens

1. World Population Prospects 2024 describes the dividend as a window of opportunity, open where the share of the population in the working ages keeps increasing more rapidly than the total population (United Nations, 2024).
2. The condition that opens that window is a substantial and sustained fall in fertility.
3. Two terms need separating before the mechanism makes sense.
   1. The demographic window is the period when the age structure is favourable, which is a measurable fact about a population.
   2. The demographic dividend is the faster growth obtained inside that window, which may or may not happen.

The Mechanism: Why Falling Fertility Widens the Working-Age Band

1. Fertility Falls
   1. Each birth cohort is smaller than the one before it.
   2. The 0 to 14 band therefore stops growing, while the 15 to 64 band keeps receiving the larger cohorts born earlier.
2. Child Dependency Drops Quickly
   1. A child born this year enters the 0 to 14 band at once, so fewer births reach the youth dependency ratio within a few years.
   2. Youth dependency is the fast-moving half of the total dependency ratio.
3. Old Age Dependency Rises Slowly
   1. Everyone who will be 65 in fifty years has already been born, so the 65 and over band cannot respond to this year's fertility for decades.
   2. The two dependent bands move at different speeds, which is what opens a gap between them.

Why the Window Has an End Date

1. The Working-Age Share Peaks
   1. Total dependency reaches its minimum, so the largest possible proportion of the population sits in the working ages.
   2. That peak can be dated from an age structure series, which is why a window has years attached to it.
2. The Window Closes
   1. The large cohorts that widened the working-age band reach 65 themselves.
   2. Old age dependency then rises faster than youth dependency is still falling, so the working-age share declines.
   3. The closing cannot be prevented, because these are the same people ageing.

Where Windows Are Open Now: Around 100 Countries Between 2024 and 2054

1. World Population Prospects 2024 counts around 100 countries and areas where the working-age share will keep rising faster than the total population between 2024 and 2054 (United Nations, 2024).
   1. That report uses ages 20 to 64 for the comparison, not the 15 to 64 band used for dependency ratios.
   2. Check which band a figure uses, because the two definitions give different numbers for the same country.
2. The same report finds the window has already closed for nearly all countries and areas whose populations had peaked in size by 2024.
   1. It has closed for three quarters of those whose populations are projected to peak between 2025 and 2054.
3. India's projected 15 to 64 share is 68.6% in 2026, against 23.8% under 15 and 7.6% aged 65 or over (UN World Population Prospects 2024, medium variant).
   1. Fertility there fell far enough for the child band to shrink, which is the condition that opened the window.
   2. Saying India's window is open is a different claim from saying India has a young population.
4. Nigeria's 15 to 64 share was 55.5% in 2023, with 41.5% under 15 and total fertility at 4.48 births per woman (UN World Population Prospects 2024).
   1. Births are still refilling the child band at close to its previous size, so the window is barely open.
   2. World Bank, DHS and UN age-structure estimates for Nigeria differ slightly because they use different sources and reference years.

The Dividend Is Conditional: What Turns a Window into Growth

1. A favourable age structure raises the number of people who could work, not the number of jobs that exist.
   1. Output rises only where the extra workers find work.
2. World Population Prospects 2024 attaches conditions to the dividend, naming substantial investment in education, health care and infrastructure, together with reforms that create decent work and improve government institutions (United Nations, 2024).
3. Five conditions decide whether a window turns into growth.

The Five Conditions That Convert a Window

1. Jobs
   1. Labour demand has to grow with the cohort, because output rises only if the extra workers are employed.
   2. Where it does not, the same cohort appears as youth unemployment instead of faster growth.
2. Education and Skills
   1. Schooling raises what each worker produces, so the size of the workforce and its productivity move separately.
3. Health
   1. Adults who are ill, or caring for someone who is, sit inside the working-age band without being at work.
4. Women's Access to Paid Work
   1. Fewer years spent bearing and raising children widens the choices open to women, paid work among them.
   2. Female labour force participation therefore decides how much of the working-age band reaches paid work.
5. Savings and Investment
   1. Households with fewer children to support can save more, which supplies capital for investment.

India: A Large Window with Uneven Conversion

1. India is benefiting from a favourable age structure, but the scale of the economic dividend depends on whether education and employment keep pace with the working-age cohort.
2. The Window Is Open
3. The UN World Population Prospects 2024 medium projection puts 68.6 percent of India's 2026 population at ages 15 to 64, with 23.8 percent under 15 and 7.6 percent aged 65 or over.

1. Those projected shares produce about 46 dependants for every 100 people of working age, which is a relatively low total dependency burden for India.
2. Using ages 15 to 59 instead, UNFPA projects that India's window will begin narrowing after 2041 and close by 2061, so the exact dates depend on the age band used.

Education And Skills Are Uneven

1. India has a large graduate and English-speaking workforce that supports advanced services, but educational attainment differs sharply between states.
2. In 2023 to 2024, 55.0 percent of adults in Kerala had completed secondary education or above, compared with 32.5 percent in Bihar (Periodic Labour Force Survey 2023 to 2024).
3. One national cohort therefore enters the labour market with very different levels of human capital.

Formal Job Creation Is The Main Bottleneck

1. The India Employment Report 2024 found that 89.9 percent of young workers and 90.4 percent of adult workers were informally employed in 2022.
2. Only 10.2 percent of young regular workers were in formal employment or receiving social security benefits, so regular work did not necessarily mean secure work.
3. IT and business services have created skilled jobs in hubs such as Bengaluru and Hyderabad, but these sectors do not absorb most of the national cohort.
4. A young person can therefore sit inside the working-age share without raising productivity, tax revenue or household savings if suitable work is unavailable.

The National Average Hides Several Timetables

1. UNFPA expects earlier-transition states such as Kerala to lose their demographic window sooner, while younger states such as Bihar retain it for longer.
2. This means education, health and job policy must respond to state-level age structures rather than to one national average.
3. India has the demographic potential for a dividend, but its conversion is partial because strong service-sector employment coexists with uneven education and widespread informal work.

South Africa: An Open Window and a Cohort without Work

1. South Africa's demographic window is open on every measure of age structure.
   1. The 15 to 64 share reached 67.4% in 2023, up from 58.3% in 1990 (UN World Population Prospects 2024).
   2. The share under 15 fell from 37.7% to 26.1% across the same years, as fertility fell from 3.72 to 2.22 births per woman.
   3. Only 6.5% of the population was aged 65 or over in 2023, so the old age load is still light.
2. The labour market has not absorbed the cohort that the window produced.
   1. Unemployment among 15 to 24 year olds was 60.9% in the first quarter of 2026 (Statistics South Africa, Quarterly Labour Force Survey).
   2. Among 25 to 34 year olds the rate was 40.6%, against a national rate of 32.7%.
   3. The share of 15 to 34 year olds not in employment, education or training was 45.6% in that quarter.

Why the Cohort Is Not Absorbed

1. Weak Labour Demand
   1. Siphelele Ngidi describes the crisis as a problem of weak labour demand in a low-growth economy, where job creation cannot absorb the expanding pool of job seekers (Econ3x3, 2026).
   2. A window supplies workers, so an economy that is not creating jobs turns that supply into a queue.
2. A Mismatch Between Shrinking and Growing Sectors
   1. Mining and manufacturing, which once offered stable formal work, have been shrinking (Ngidi, Econ3x3, 2026).
   2. The competencies those industries built do not match the demands of the expanding service sector, so experience in one does not carry across to the other.
3. Distance From Work
   1. Those industrial hubs sat outside the main metropolitan areas (Ngidi, Econ3x3, 2026).
   2. Apartheid-era settlement policy placed many black South Africans far from centres of work, a distance that outlasted the policy itself.
   3. As the hubs hollow out, young job seekers face what Ngidi calls a spatial tax, because reaching urban work now means paying to move.
4. The Cost of Looking for Work
   1. Transport, internet access, relocation, clothing and further training all shape whether a person can search for a job at all (Ngidi, Econ3x3, 2026).

Why a Missed Window Cannot Be Reopened

1. A person inside the working-age band who is neither working nor training contributes nothing to measured output, whatever else they are doing.
   1. That person also gains no skills to bring to a job later, so the loss carries forward.
2. The window will not stay open indefinitely, because fertility at 2.22 in 2023 is already close to the replacement level.
   1. Falling fertility narrows the child band now, then narrows the working-age band a generation later.
   2. A window that passes without work cannot be reopened, because cohorts age in one direction only.
3. Any pairing works if you can date the window and show what did or did not absorb the cohort.

Population and Possible Futures: Who Decides What a Window Is Worth

1. Population can act as a resource when a large working-age cohort expands the range of possible economic futures.
   1. Possibility is the key concept behind it, meaning the range of futures open to a place rather than one fixed outcome.
2. A working-age cohort is a set of people with their own plans, so describing a population as a resource says something about a country's options rather than about the people themselves.
   1. The same cohort can end up in secure work, in insecure work, or out of work altogether.
   2. All three futures are consistent with one age structure, which is what makes the dividend a possibility rather than a forecast.
3. Projections supply the dates, not the outcomes.
   1. World Population Prospects 2024 put the world population at 8.2 billion in 2024, with a projected peak of around 10.3 billion in the mid-2080s (United Nations, 2024).
   2. It projects that by the late 2070s the number of people aged 65 or over will reach 2.2 billion, passing the number of children under 18.
   3. A projection fixes when a window opens and closes for a country, whereas what happens between those two dates is decided by people.

Who Holds Power Over the Decision

1. National Governments
   1. They set education, health and labour market policy.
   2. They also decide how much of a budget goes to schools rather than to pensions.
2. Employers
   1. They decide how many jobs exist and what those jobs pay.
   2. India's IT and business-services firms have created skilled work in Bengaluru and Hyderabad, but widespread informal employment shows that these jobs do not absorb most of the cohort.
3. Young People Themselves
   1. Choices about schooling, migration and family size feed back into the age structure.
   2. Emigration of young adults removes part of the cohort a window was supposed to supply.
4. Lenders and Donors
   1. Conditions attached to loans and aid shape what a government can spend on schools and clinics.
   2. The power to decide therefore sits partly outside the country whose window is open.