Can 'baby busts' mean economic booms? Why low birth rates and aging populations may not be the disaster we thought
The world is experiencing a demographic shift: people are having fewer babies and living longer. This has led to concerns about the impact on economic growth, with the assumption being that slower growth will lead to a decline in productivity and innovation. However, new research challenges this notion, suggesting that lower birth rates may actually be associated with higher economic growth.
The report, 'Baby Busts and Growth Booms', distributed by the National Bureau of Economic Research, found that lower birth rates are linked to higher GDP per working-age adult and higher wage growth across US commuting zones. This finding contradicts the common belief that these trends hinder economic growth. In fact, the study reveals that each percentage-point drop in birth rates is accompanied by a 26.8% increase in GDP per worker.
The researchers argue that this pattern is not due to higher education levels, increased female labor force participation, or a shift from agriculture to manufacturing. Instead, they attribute it to the 'labor-saving response of technology to the scarcity of younger workers'. Countries with lower birth rates, the study finds, tend to have more patents and high-tech activity.
The impact of lower fertility rates is far-reaching. The worldwide total fertility rate has dropped from 5.3 in the 1960s to 2.2 in 2024, with the replacement level fertility (RLF) considered to be 2.1 children per woman. In the US, the total fertility rate is 1.6, significantly below the RLF. This trend is expected to slow population growth, with projections indicating a decline from 0.3% a year to 0.1% a year from 2037 to 2056.
However, the authors of the report caution that these demographic changes may also bring about institutional and policy changes, potentially offsetting the negative effects of aging and population decline. One concern is Social Security, with the retirement trust fund expected to run out by 2032. As the workforce ages and the population of retirees grows, the program's revenue may not cover its benefits, leading to a 24% reduction in benefits unless immediate action is taken.
Despite the potential benefits of lower birth rates, the article acknowledges that having more babies is not a solution. The increasing costs of raising children, with childcare being more expensive than rent in many states, make larger families financially impractical for many. Women who step away from the workforce to raise children may miss out on peak earning years, impacting their Social Security benefits and retirement savings.
In conclusion, the article suggests that while lower birth rates may contribute to higher total factor productivity, larger capital stocks, and a shift towards exports in high-tech industries, they may also pose challenges for Social Security. To secure retirement, financial experts recommend setting aside 10-15% of income through various retirement plans and investing in a diversified portfolio. The article emphasizes the importance of proactive planning and the potential need for financial advice in navigating the uncertainties surrounding Social Security's future.
