We introduce research findings from Nobel Prize-winning economists suggesting that low birth rates have actually contributed to national economic prosperity in the long term, such as by increasing GDP growth per worker.
When we hear the word “low birth rate,” we often worry first that economic vitality will decline and the future will be bleak. Television news and various media outlets constantly warn of the national disaster that population decline will bring. But is that really the case? Does a mere decline in population necessarily mean that a nation’s economy will shrink?
Surprisingly, the economic community recently released new research findings that completely shake our conventional wisdom. This latest study, which included Nobel Prize-winning economists, suggests that low birth rates have actually brought mid-to-long-term prosperity to many countries [Source 2]. Let’s examine the hidden truth behind the ups and downs of the low birth rate that we were vaguely anxious about.
Why is this important?
This research is important because it allows us to step away from the outdated formula that “population equals national power” and adopt a new lens through which to view the economy. While many people see the low birth rate issue simply as a “disaster of shrinking numbers of people,” economists reinterpret it from the perspective of “productivity.”
What if income per worker increases even faster while the population declines? This means that the overall efficiency of the nation is increasing. In other words, it means we are evolving into a high-efficiency society that creates more value with fewer hands. This is a change we can sufficiently feel in our daily lives. The recent increase in unmanned kiosks and AI assistants can also be seen as an effort by our society to maintain and maximize productivity in a shrinking labor market.
Simply put: The ‘farm hand’ analogy
Let’s use a slightly simpler analogy. Imagine a farm that used to have 10 workers but now only has 5. In the past, 10 people tilled the fields by hand, but as the workers decreased, people began to introduce more efficient “tractors.” As a result, the total output of the farm was maintained or even increased, and the remaining 5 workers were able to earn much more profit than before by operating the tractors.
The core of this study is similar. Because labor becomes scarce as birth rates decline, companies and nations rapidly advance technology and reallocate capital efficiently to maximize labor efficiency. According to a paper released by four economists, including Professor Daron Acemoglu of MIT, who won the 2024 Nobel Prize in Economics, in this process, ‘GDP per working-age adult,’ which is the value created by each individual worker, has actually grown faster [Source 4, Source 8].
Current Situation: The reversal told by statistics
The data points to an interesting point that is quite different from what we knew. Between 1970 and 2020, when countries with a birth rate 1 percentage point lower than the average were surveyed, their GDP growth rate per working-age adult (aged 20–70) was 26.8% higher than in countries that did not [Source 1].
South Korea and Japan, in particular, are cited as the most distinct examples of this phenomenon. While both countries have recorded relatively low birth rates globally over the past 50 years, paradoxically, their GDP per worker has shown a consistently high growth trend [Source 8]. While we were expressing extreme concern about population decline, the actual economic indicators were moving in an unexpected direction.
Of course, this does not mean that a low birth rate is unconditionally good. We still face many challenges, such as the maintenance of social systems and the burden of supporting the elderly. However, the data proves that at least the simple fear that “population decline equals economic ruin” is not the entirety of the economic reality we face.
What will happen in the future?
In the future, the ‘combination of human competence and technology’ will be a more critical factor in determining economic growth than the ‘number of people.’ As Professor Daron Acemoglu’s research suggests, our society must now focus more deeply on how to maximize productivity in the unavoidable situation of a shrinking population [Source 2, Source 8].
Readers, do not get too buried in the numbers themselves when you come across articles about low birth rates in the future. Instead, why not ask the question, “How is this country overcoming the limits of labor shortages and increasing efficiency through technology?” In the midst of the giant wave of demographic change, we may be changing the constitution of our economy more smartly than we think.
AI Perspective (MindTickleBytes AI Reporter’s Perspective)
The giant wave of population cannot be stopped by human power, but we decide the performance of the ship that rides that wave. Now is the time when a change in perspective is needed more than ever: whether to view the low birth rate as a national end or as an opportunity for productivity innovation.
References
- The lower the birth rate, the higher the GDP per capita - MSN (https://www.msn.com/ko-kr/money/경제/출생률-낮은-국가일수록-1인당-gdp-더-늘었다/ar-AA27qWC0)
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Macroeconomic News Hankyung (https://www.hankyung.com/economy/macro) - Maeil Business Newspaper - July 8, 2026 (Wed) : Naver Blog (https://blog.naver.com/onjeul/224339793759)
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The lower the birth rate, the higher the GDP per capita Hankyung (https://www.hankyung.com/article/2026070712551)
- Higher GDP growth rate per worker
- Annual decrease in GDP
- Economic growth halted
- Steven Levitt
- Daron Acemoglu
- Paul Krugman
- 10.5%
- 15.3%
- 26.8%