“Unintended Consequences is far smarter and more thought-provoking than most economics written for the general public” - Greg Mankiw, Harvard University, Former Chairman of the Council of Economic Advisors
“…a must-read for serious students of economic policy.” - Glenn Hubbard, Dean, Columbia Business School, and former Chairman of the Council of Economic Advisers
“…a comprehensive explanation of the modern economy.” - Julian Robertson, Founder, Tiger Management
“There are an amazing number of good ideas and interesting points made in Unintended Consequences. The thinking underlying it, and the obvious depth of understanding of the author, are very impressive.” - Steven Levitt, coauthor of Freakonomics; 2004 John Bates Clark Medal
“Unintended Consequences should be read by anyone who takes for granted the superiority of progressive taxation and has not thought carefully about the trade-offs involved.” - The New Republic
“A full-throated defense of economic dynamism.” - The Wall Street Journal
“…a fresh argument for the productive value of inequality.” - David Autor, Professor of Economics, Massachusetts Institute of Technology
“…a comprehensive explanation of the modern economy.” - Julian Robertson, Founder, Tiger Management
“…a very valuable contribution.” - Larry Summers, former Secretary of the Treasury and director of the National Economic Council, president emeritus, Harvard University
“…a must-read for serious students of economic policy.” - Glenn Hubbard, Dean, Columbia Business School, and former Chairman of the Council of Economic Advisers
“Unintended Consequences offers deep and well-argued analyses on almost every issue.” - The New York Times
“…a fresh argument for the productive value of inequality.” - David Autor, Professor of Economics, Massachusetts Institute of Technology
AI Summary.U.S. survey data on high school students show the share of 9th graders identifying as lesbian, gay, or bisexual fell from 17% to 11% over two years, compared with a decline from 18% to 16% among 12th graders. The drop was concentrated among girls, from 27% to 22%, versus 9% to 7% among boys.
Jean TwengeGeneration Tech
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Among US high-school students, the LGB share fell btw 2023 to 2025 by 5pp for girls (27% to 22%), and 2pp for boys (9% to 7%). The preceding rise was likewise larger for girls: +128% from 2015 to 2021, versus +99% for boys to 2023.
Are younger teens less likely to identify as lesbian, gay, or bisexual?
Core argument: The share of U.S. 9th graders identifying as lesbian, gay, or bisexual fell from 17% in 2023 to 11% in 2025 in the CDC’s Youth Risk Behavior Survey, while 12th graders declined from 18% to 16%.
[New data from the Youth Risk Survey of U.S. 9th to 12th graders from the CDC shows] for 12th graders, 17 and 18 years old, identifying as LGB declines only a few percentage points between 2023 and 2025 (from 18% to 16%). But the headline result is for 9th graders (14 and 15 years old): Identifying as LGB absolutely plummets between 2023 and 2025, from 17% to 11%. That really does look like a free fall. The decline appears to be driven almost entirely by girls. Identifying as LGB dropped from 27% in 2023 to 22% in 2025 among girls, and from 9% to 7% among boys. [In terms of the share of high school students reporting engaging in same-sex activity] most high school students are not sexually active, so this is only a subsample of the larger group. For boys, there’s been a fairly steady rise in same-sex partners, not too different from the pattern of identifying as LGB among boys. The story is different for girls, where having non-heterosexual sex peaked in 2021 and then fell steeply.
Takeaways by Macro Roundup® AI
The share of U.S. 9th graders identifying as lesbian, gay, or bisexual fell from 17% in 2023 to 11% in 2025 in the CDC’s Youth Risk Behavior Survey, while 12th graders declined from 18% to 16%.
The decline appears driven almost entirely by girls, whose LGB identification fell from 27% in 2023 to 22% in 2025, compared with a drop from 9% to 7% among boys.
Among sexually active teens, the share of boys reporting at least one same-sex partner has risen fairly steadily, while for girls it peaked in 2021 and then fell steeply.
Related Articles:
Is There Really a Generational Difference in Identifying as Lesbian, Gay, or Bisexual?— General Social Survey data show that increases among young American adults appear in same-sex sexual behavior as well as in identification, with 20% reporting a same-sex partner versus 18.5% identifying as lesbian, gay, or bisexual. The increases are larger among 27- to 41-year-olds.
Teens Used To Be Happier. What Changed?— The share of US high school seniors describing themselves as "very happy" peaked at 24.8% and remained around 24.4% before falling to 11.4% at its low, recovering only to 12.7%, well below the 17.9% recorded before the pandemic. The decline coincided with smartphones and social media becoming pervasive.
US College Students’ Well-Being— A study of US college students finds moderate-to-severe depression reported by 26% of students at one elite institution, 22% reporting moderate-to-severe anxiety and 10% contemplating suicide. Poorer mental health is associated with being female, little exercise, low grades, and financial aid; financial stress is associated with higher suicidal thoughts.
AI Summary.Across surveyed countries, intended fertility and the ideal number of children both declined, while children came to be seen more as a constraint on parental freedom and less as a source of status. Gender roles grew less traditional and housework more equally shared, yet the belief that a fulfilled life requires children weakened most of all attitudes measured.
Raquel Fernández, Inés Berniell and Milagros OnofriNational Bureau of Economic Research
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Fernández et al. cast doubt on Goldin’s hypothesis that men’s limited willingness to share domestic responsibilities is central to fertility decline, pointing instead to the erosion of the belief that children are necessary for a fulfilling life.
Are shifting attitudes about children behind falling fertility intentions?
Core argument: Intended fertility fell in every Generations and Gender Survey country, from 28% to 21% on average, while the ideal number of children fell in 17 of 22 International Social Survey Programme countries, from 2.42 to 2.31.
Figure 1 documents how fertility outcomes and attitudes changed over the decade. Intended fertility fell in every GGS country, from 28 to 21% on average (Figure 1a). The ideal number of children fell in 17 of the 22 ISSP countries, from 2.42 to 2.31 on average (Figure 1b). [Children] became more likely to be seen as constraining parental freedom and less likely to be seen as conferring status (Figure 1c). Gender roles became less traditional, and the division of household work became more equal [Figures 1i]. Despite this greater sharing of chores and care, work–family conflict rose sharply. The decade saw changes that might have been expected to make the burden of children lighter, at least for women. Simultaneously, however, children became less attractive and, above all, less necessary: the belief that a fulfilled life requires children lost more ground than any attitude we measure [Table 2, Part II, Panel B].
Takeaways by Macro Roundup® AI
Intended fertility fell in every Generations and Gender Survey country, from 28% to 21% on average, while the ideal number of children fell in 17 of 22 International Social Survey Programme countries, from 2.42 to 2.31.
Children became more likely to be seen as constraining parental freedom and less likely to be seen as conferring status, and the belief that a fulfilled life requires children lost more ground than any other attitude measured.
Gender roles became less traditional and household work was divided more equally, yet work–family conflict rose sharply.
Related Articles:
The Rise of Female Autonomy and the Decline of Fertility: The Role of Mismatch— Across 22 countries, the gap between women's and men's daily hours of housework and caregiving is strongly correlated with lower total fertility rates. Countries that modernized rapidly show larger gender gaps in home work and lower fertility than those with more continuous economic growth since 1920.
Babies and the Macroeconomy— Fertility rates have fallen in nearly every country, but timing differed: some developed nations fell below the 2.1 replacement level as early as the 1970s, while others dropped to "lowest low" levels below 1.3. The author argues nations with rapid, discontinuous growth saw sharper declines as women's expectations outpaced tradition-bound men's willingness to share family time.
The Demographic Future of Humanity: Facts and Consequences— The authors estimate the world total fertility rate is around 2.17, below the global replacement rate of roughly 2.21, meaning humanity is already below replacement, with fertility and births falling faster than anticipated. They project middle-income countries' fertility may fall below that of rich countries outside East Asia, with emigration compounding population decline.
AI Summary.Survey data indicate 60% of U.S. adults say the term "working class" describes them well, including half of those with a bachelor's degree and half of upper-income Americans. Identification is highest among blue-collar workers at 77%, versus 61% in other occupations, and ranges from 52% of Asian adults to 62% of White adults.
Steven Shepard, Hannah Hartig, Andy Cerda and Jocelyn KileyPew Research Center
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60% of Americans say “working class” describes them “extremely” or “very” well. Republicans are more likely than Democrats to identify as working class – strikingly 61% of Republicans who have a family income of at least $155,600 identify as working class, compared to 38% of such Democrats.
Do most Americans identify as working class across income and education levels?
Core argument: 60% of U.S. adults say the term "working class" describes them well, an identity adopted across income and educational groups, including half of those with a bachelor's degree and half of upper-income Americans.
Most Americans think of themselves as “working class” today: Overall, 60% of U.S. adults say the term describes them well. And the identity is widely adopted by people across all income and educational groups – including half of both Americans who have a bachelor’s degree and those who are upper-income. Those working in blue-collar occupations are particularly likely to identify as working class (77%), [as are] a majority of those working in other occupations (61%). White adults are more likely than Black adults to identify as working class. About six-in-ten White (62%) and Hispanic adults (59%) overall view themselves as working class, as do roughly half of Black (54%) and Asian adults (52%).
Takeaways by Macro Roundup® AI
60% of U.S. adults say the term "working class" describes them well, an identity adopted across income and educational groups, including half of those with a bachelor's degree and half of upper-income Americans.
Workers in blue-collar occupations identify as working class at a rate of 77%, compared with 61% of those in other occupations.
About 62% of White and 59% of Hispanic adults view themselves as working class, as do roughly 54% of Black and 52% of Asian adults.
Related Articles:
America’s Support for Capitalism Has Declined Over Last Decade— Just under half of Americans say capitalism is working very or somewhat well, down from 60% about a decade ago, according to a Wall Street Journal-NORC survey. Only 12% say democracy is working very or extremely well, and 16% say average citizens have considerable influence on politics.
Political Representation Gaps and Populism— A study comparing survey responses of citizens and parliamentarians across 27 European countries finds that policymaking reflects voters' economic attitudes well, but the average parliamentarian is about one standard deviation more culturally liberal than the national mean voter. The author finds this cultural gap spans nearly all issues, countries, and established parties, and that right-wing populists fill it.
The DSA Sweet Spot: Highly Educated, Downwardly Mobile— US voters most likely to identify as "very liberal" hold postgraduate degrees but household incomes of $30,000–$60,000 a year, an unusual combination given that education and income are typically positively correlated. In the Democratic Socialists of America's most recent member survey, 80% of members aged 25 or older had bachelor's degrees while 45% reported household incomes below $60,000.
AI Summary.Official Spanish data show births exceeded deaths by barely 200,000 over the first quarter of the 21st century—less than 0.5% of Spain's population at the start—while immigration accounted for 98% of the country's population growth, the largest increase of any European Union member. Deaths have exceeded births since 2015.
Nicholas EberstadtAmerican Enterprise Institute
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Btw 2000 and 2025, ~98% of Spain’s population growth was due to immigration. In 2024, about one-third of babies born in Spain had a foreign-born mother.
Has immigration accounted for nearly all of Spain's population growth?
Core argument: Immigration accounted for 98% of Spain's population growth between 2000 and 2025, according to official Spanish data.
Without immigration, Spain’s population would have stagnated in the first quarter of the 21st century. According to official Spanish data, births exceeded deaths by barely 200,000 for the 2000-2025 period (2025 numbers still provisional)—or less than one half of 1% of Spain’s 2000 population. Thanks to its robust immigration inflows, however, Spain registered more population growth than any other EU country between 2000 and 2025. Virtually all (98%) of Spain’s population growth was due to immigration during those years. And since deaths have exceeded births in Spain since 2015, any future growth would have to come entirely from additional immigration.
Takeaways by Macro Roundup® AI
Immigration accounted for 98% of Spain's population growth between 2000 and 2025, according to official Spanish data.
Spain's births exceeded deaths by barely 200,000 over 2000–2025, with 2025 figures still provisional, less than one half of 1% of Spain's 2000 population.
Spain registered more population growth than any other EU country between 2000 and 2025 on the strength of immigration inflows, and with deaths exceeding births since 2015, any future growth would have to come entirely from additional immigration.
Related Articles:
European Stagnation Is Real— Comparing the United States, France, and Germany at current purchasing power parity prices shows the European economies roughly constant relative to America since 2000, but current-price measures miss output gains in sectors where prices fall, such as software. The author argues constant-price comparisons, the standard approach for growth over time, reveal greater European stagnation.
Four Ways Europe’s Big Immigration Experiment Has Changed Spain— Spain has been the world's fastest-growing large advanced economy and, by Financial Times analysis, accounted for one in four of the 11.1mn jobs added across the European Union, with roughly 70% going to immigrants according to the think-tank Funcas. Spain's fertility rate of 1.1 births per woman is the EU's lowest after Malta.
Depopulation Globally and in the Asia-Pacific: The Shape of Things to Come— Population aging and fertility below replacement levels are connected to a revolution in family structure in which families grow smaller, fewer people marry, and voluntary childlessness becomes common across countries. As a result, families become less able to bear the demands that may be placed on them.
AI Summary.Global fertility is likely below the replacement level needed to keep population constant in the long run, though population momentum from large cohorts of women now having children means world population will keep growing for roughly another 30 years. Unless trends change, it is projected to peak near 9bn around 2056 and then decline.
Jesús Fernández-Villaverde and Patrick NorrickUniversity of Pennsylvania
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The UN appears to systematically overestimate births; e.g. 33 of 37 countries with high-quality statistics registered fewer births in 2024 than the UN had forecast. Fernández-Villaverde and Norrick infer humanity is below replacement fertility in 2026.
Will world population keep growing even as fertility falls below replacement?
Core argument: As of 2026, humanity is likely to be below replacement fertility, with fewer births than needed to keep population constant in the long run.
In Table A1 we compare the World Population Prospects (WPP) estimates of births in 2022-2023 with the official numbers reported by several countries. [A2 shows the full sample with the deviations.] As of 2026, humanity is likely to be below the replacement fertility level: we are having fewer births than we need to keep population constant in the long run. This astonishing fact does not mean that population has stopped growing. Because of momentum effects (the large cohorts of women born two or three decades ago are having their children now, and their own parents have not died yet), world population will keep growing for another 30 years or so. But unless trends change, it will peak at roughly 9 billion around 2056 and then start falling, first slowly, then fast.
Takeaways by Macro Roundup® AI
As of 2026, humanity is likely to be below replacement fertility, with fewer births than needed to keep population constant in the long run.
World population is set to keep growing for roughly another 30 years because of momentum effects, as large cohorts of women born two or three decades ago have their children while their own parents are still alive.
Unless trends change, world population will peak at roughly 9 billion around 2056 and then start falling, first slowly, then fast.
Related Articles:
The Demographic Future of Humanity: Facts and Consequences— The authors estimate the world total fertility rate is around 2.17, below the global replacement rate of roughly 2.21, meaning humanity is already below replacement, with fertility and births falling faster than anticipated. They project middle-income countries' fertility may fall below that of rich countries outside East Asia, with emigration compounding population decline.
Depopulation Globally and in the Asia-Pacific: The Shape of Things to Come— Population aging and fertility below replacement levels are connected to a revolution in family structure in which families grow smaller, fewer people marry, and voluntary childlessness becomes common across countries. As a result, families become less able to bear the demands that may be placed on them.
The Wealth of Working Nations— Because of population aging, growth in GDP per capita and GDP per working-age adult have diverged across advanced economies; from 1998 to 2019 Japan's accumulated growth per working-age adult was 31.9% versus 29.5% in the US. The authors find a standard neoclassical growth model calibrated to each country's working-age population tracks output per working-age adult in most economies.
AI Summary.Immigration from Asia and Latin America has been the chief driver of rising US diversity and the declining non-Hispanic White share of the population. Intermarriage across racial and ethnic lines is far more common among Hispanic and Asian Americans, and rising among Black and non-Hispanic White Americans, leaving more people outside single racial categories.
Justin FoxBloomberg
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Less than half of Americans < 29 years old are non-Hispanic whites. As of 2020, 33.8mm Americans – 10.2% of the population – identify as being of two or more races, largely driven by intermarriage between whites and either Hispanics or Asian Americans.
Are immigration and intermarriage making single racial categories obsolete?
Core argument: Immigration from Asia and Latin America since the 1960s has been the chief driver of rising U.S. diversity and the declining non-Hispanic White share of the population.
The increase in immigration from Asia and Latin America since the 1960s has been the chief driver of the rise in diversity and decline in the non-Hispanic White share of the population. But those immigrants have been doing what generations of immigrants before them did and, well, becoming Americans. Marriages across racial and ethnic lines are much more prevalent among Hispanic and Asian Americans than Black or non-Hispanic White Americans, while intermarriage rates have been rising steadily for the latter two groups, too. As a result, a growing share of Americans just isn’t going to fit neatly into any single racial or ethnic category that the US government can come up with.
Takeaways by Macro Roundup® AI
Immigration from Asia and Latin America since the 1960s has been the chief driver of rising U.S. diversity and the declining non-Hispanic White share of the population.
Intermarriage across racial and ethnic lines is much more prevalent among Hispanic and Asian Americans than among Black or non-Hispanic White Americans, though rates have been rising steadily for the latter two groups as well.
A growing share of Americans does not fit neatly into any single racial or ethnic category the U.S. government defines, as recent immigrants follow earlier generations in becoming Americans.
Related Articles:
Do Adults Have the Skills They Need to Thrive in a Changing World?— An international assessment of adult skills describes numeracy proficiency levels ranging from counting objects and adding small whole numbers at the lowest level, to extracting information from tables and graphs and performing basic arithmetic with money and percentages at Level 1, up to analysing complex mathematical information and critically evaluating whether data support a claim at Level 5.
Do Past Wealth Gaps Explain Modern Inequality? Evidence From Immigration To The United States— Historical records indicate immigrants arriving in the United States around the turn of the twentieth century came with almost no wealth, and by 1920 nearly half of white adults were foreign-born or had foreign-born parents. Households of Southern or Eastern European ancestry, who arrived later with fewer resources, are on average wealthier than those of Northwestern European ancestry.
America’s Immigration Mess: An Illustrated Guide— Current Population Survey estimates indicate America's foreign-born population surpassed 50m for the first time and exceeded 15% of the national population, above the prior peak of 14.8% recorded in 1890. Mass immigration during that earlier wave was associated in contemporary opinion with widening income and wealth gaps and depressed wages for less-skilled native-born men, and sweeping national restrictions followed.
AI Summary.Sub-Saharan Africa's cereal output is nearly 5x its 1960s level, but most gains came from cultivating more land rather than higher yields, and arable land per person has been falling for decades. Food and Agriculture Organisation data show cereal yields flat in recent years, with most African countries recording lower agricultural total factor productivity than a decade earlier.
Economist StaffThe Economist
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Most Sub-Saharan African countries had lower agricultural TFP in 2023 than they had a decade earlier. Btw 2008 and 2019, in the face of a rapidly rising population, small farms’ yields were falling by 3 to 4% per year.
Is Africa's crop growth coming from more land, not higher yields?
Core argument: Sub-Saharan Africa's farmers grow nearly five times as much cereal, such as maize and rice, as in the 1960s, but most of those gains came from cultivating more land rather than raising output per hectare.
In aggregate [sub-Saharan Africa's] farmers are growing more cereals, such as maize (corn) and rice, than ever: nearly five times as much as in the 1960s. But most of those gains came from cultivating more land, which cannot go on for ever. The amount of arable land per person has been falling for decades, and now sits at roughly the global average. That might not matter if farmers were also growing more crops per hectare. But recently gentle growth in agricultural productivity has given way to stagnation, perhaps even decline. Consider figures drawn from national statistics in Africa by the Food and Agriculture Organisation. Cereal yields did not grow between 2020 and 2024, the latest data point. Nor did total factor productivity (TFP), a measure of how efficiently inputs of all kinds (such as labour and machinery) are turned into produce. Most African countries had lower agricultural TFP in 2023 than a decade before.
Takeaways by Macro Roundup® AI
Sub-Saharan Africa's farmers grow nearly five times as much cereal, such as maize and rice, as in the 1960s, but most of those gains came from cultivating more land rather than raising output per hectare.
Cereal yields in Africa did not grow between 2020 and 2024, and neither did total factor productivity, a measure of how efficiently inputs such as labour and machinery are turned into produce, according to Food and Agriculture Organisation figures drawn from national statistics.
Arable land per person in sub-Saharan Africa has been falling for decades and now sits at roughly the global average, while most African countries had lower agricultural total factor productivity in 2023 than a decade before.
Related Articles:
21st-Century Africa Governance and Growth— Sub-Saharan Africa's GDP per capita has fallen relative to the world average over three decades, from 30% to 22%, reflecting the region's inability to sustain growth. Had it grown at the global pace since 1990, income per capita would be over 40% higher; at emerging East Asia's pace, nearly 3x higher.
Africa Needs 1 Billion Jobs by the End of the Century. Where Will It Find Them?— Africa's population, now about 1.5bn, is projected to reach 4bn by 2100, with sub-Saharan Africa approaching 3.5bn and Nigeria's working-age population forecast to exceed 320m. Between 2005 and 2020, Congo, Nigeria, Ethiopia and other large states averaged only one job created for every two entrants to the working-age population.
Changing Sub-Saharan Africa’s Growth Trajectory— Sub-Saharan Africa's working-age population is growing nearly 3% a year, versus close to zero in much of the world, and is projected to exceed China's within about a decade and reach a quarter of the global total. With modest productivity growth near 2%, the region is likely among the world's fastest-growing.
AI Summary.The surge of baby boomers, women, and immigrants entering the US labor force between 1960 and 1980 was difficult for the economy to absorb, and young workers' wages fell sharply after peaking in the early 1970s. The author argues those entrants kept occupying jobs and suppressing demand for new workers until retirement.
Steven RugglesProceedings of the National Academy of Sciences
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Accounting for both inflows and the overhang of previous labor market entrants, Ruggles predicts a labor shortage such that “Americans born in the 2020s might be the first cohort in a half century that earns significantly more than their parents did.”
How does a large influx of workers affect young workers' wages?
Core argument: Wages for young U.S. workers declined sharply after peaking in 1973, as the economy struggled to absorb the influx of workers entering the labor force between 1960 and 1980 from the baby-boom cohort, rising female participation, and increased immigration.
Figure 3A highlights the influx of workers that occurred between 1960 and 1980, as the large baby-boom cohort entered the labor force, female labor-force participation expanded, and immigration rose [see Figure 2 for a detailed breakdown]. It was difficult for the economy to absorb all the new workers, and wages for young people declined sharply after peaking in 1973. Figure 3A does not, however, provide a valid measure of labor-market competition because the baby boomers and newly employed women and immigrants did not suddenly vanish after they entered the labor force; they kept working and occupying jobs until they eventually retired decades later. The glut of workers entering the labor force in the 1970s would continue to stifle demand for new workers until their eventual exit from the labor force, a process that is still in progress. The index of employment competition shown in Figure 3B is [a better] measure of relative cohort size than 3A. It represents the cumulative net labor-market entries over the previous five decades as a % of the working-age population in the current decade. As shown in Figure 1C, we are already seeing signs of an uptick in the wages of young workers, and as the demographic shortage accelerates we may finally see real wages of the young exceed the levels of the early 1970s.
Takeaways by Macro Roundup® AI
Wages for young U.S. workers declined sharply after peaking in 1973, as the economy struggled to absorb the influx of workers entering the labor force between 1960 and 1980 from the baby-boom cohort, rising female participation, and increased immigration.
Decennial labor-force entries alone misstate labor-market competition, because baby boomers, newly employed women, and immigrants kept occupying jobs and stifling demand for new workers until their retirements, a process still in progress.
An index of employment competition measuring cumulative net labor-market entries over the previous five decades as a percentage of the current decade's working-age population is offered as a better gauge of relative cohort size, with young workers' wages already showing an uptick.
Related Articles:
Baby Busts and Growth Booms: Demographic Change and the Macroeconomy— A 1pp lower birth rate 20 years earlier is associated with 22 log points higher output per worker 20 years later and 29 log points higher after 40 years, about 0.73pp faster annual growth. The authors find lower birth rates are also associated with more labor-saving patents, larger high-tech shares, and higher productivity growth.
Technology and the Baby Bust Paradox— Aging populations create structural incentives to automate, and the argument is that demographic change could become one of the strongest long-run drivers of artificial intelligence deployment. Technology-producing economies may benefit twice, offsetting their own labor shortages while exporting automation, robotics, and AI to other aging societies.
Can A Depopulating America Still Flourish?— US labor force participation among women aged 25-54 has reached all-time highs, exceeding its previous 1999 peak, yet remains over 4 points below Europe's level and nearly 6 points below Japan's. About 3.5m prime-age American women are neither working nor looking for work, without children at home or husbands, compared with roughly 7m such men.