AI Summary. An analysis of authors at a leading AI research conference finds China is the largest originating source of elite AI talent, with its share of researchers holding Chinese undergraduate degrees rising 11 percentage points to 57%, while the US share fell to 13%. The US remains a net importer of AI researchers, gaining 2,145 while China lost 1,729.

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Surveying education/employment histories of authors at the Neural Information Processing Systems conference, Ma and Yang infer China educated 57% of elite AI talent as of 2025, versus 13% for the US. Yet the US gained 2,145 researchers y/y while China lost 1,729.

Does China produce the most elite AI talent while America attracts it?

Core argument: Damien Ma and Binyi Yang find China’s share of elite AI talent, defined by undergraduate degrees earned in China, rose 11 percentage points to 57% in 2025 versus 2022, while the U.S. share fell to 13%.

[Using a methodology based on paper authors from the Neural Information Processing Systems conference (NeurIPS) Damien Ma and Binyi Yang find] China has established a commanding lead as the largest originating source of elite AI talent globally. Compared to 2022, the share of Chinese-origin AI talent, defined as those who received undergraduate degrees in China, increased 11 percentage points to 57% in 2025, while the U.S. share fell to 13%. The United States remains a magnet for global AI talent, particularly Chinese talent. Despite U.S.-China tensions, among AI researchers working in the United States, the 2025 share of those holding undergraduate degrees from China rose by 4 percentage points. When it comes to brain gain vs. brain drain, the United States saw a net gain of +2,145 researchers in 2025 while China registered a net loss of -1,729 researchers.

Takeaways by Macro Roundup® AI

  1. Damien Ma and Binyi Yang find China’s share of elite AI talent, defined by undergraduate degrees earned in China, rose 11 percentage points to 57% in 2025 versus 2022, while the U.S. share fell to 13%.
  2. Among AI researchers working in the United States, the share holding Chinese undergraduate degrees rose 4 percentage points in 2025, despite U.S.-China tensions.
  3. The United States recorded a net gain of 2,145 AI researchers in 2025, while China registered a net loss of 1,729, under Ma and Yang’s methodology based on NeurIPS paper authors.

AI Summary. Spain's first- and second-generation immigrant population totals at least 12mm—nearly 9.5mm immigrants and over 2.5mm descendants—out of a population of roughly 49mm. The authors estimate over a third of Spain's under-40 population and nearly two-fifths of children under 5 are immigrants or the children of immigrants.

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Spain’s population of first and second generation immigrants from Latin America (~5.7mm), and Morocco or other African countries (~2.4mm), accounts for nearly one sixth of Spain’s population. There are ~37mm native Spaniards.

How large is Spain's first- and second-generation immigrant population?

Core argument: Spain's first- and second-generation immigrant population totals at least 12 million—almost 9.5 million immigrants and over 2.5 million descendants—out of a population of roughly 49 million at the start of 2025.

Spain’s first and second-generation immigrant population comprises at least 12 million—almost 9.5 million immigrants and over 2.5 million of their descendants. [Spain’s population was ~49mm at the starts of 2025.] Over a third of Spain’s under 40 population are now first or second generation immigrants. And our numbers suggest that nearly two-fifths of Spain’s children under 5 are the children of immigrants, or immigrants themselves. Since our method misses second-generation immigrants not living with their parents, the absolute and relative size of Spain’s mass migration population is likely somewhat greater than we estimate.

Takeaways by Macro Roundup® AI

  1. Spain's first- and second-generation immigrant population totals at least 12 million—almost 9.5 million immigrants and over 2.5 million descendants—out of a population of roughly 49 million at the start of 2025.
  2. Over a third of Spain's under-40 population are first- or second-generation immigrants, and the estimates suggest nearly two-fifths of children under 5 are immigrants or the children of immigrants.
  3. Because the estimating method misses second-generation immigrants not living with their parents, Spain's mass migration population is likely somewhat larger in both absolute and relative terms than the figures indicate.

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.

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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

  1. Immigration accounted for 98% of Spain's population growth between 2000 and 2025, according to official Spanish data.
  2. 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.
  3. 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.

AI Summary. Swiss voters rejected a proposal that would have capped the country's population at 10mn, up from about 9.1mn, requiring government measures to curb growth past 9.5mn and potentially ending free movement of people with the European Union. Opponents including the government, business groups and trade unions argued it threatened economic growth and access to foreign labour.

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Swiss voters rejected by 54–46% a proposal to cap the country’s population at 10mm. The proposal would have required the government to take measures to curb population growth once its level hits 9.5mm. The Swiss population is ~ 9.1mm today.

Will voters approve a national population cap that limits immigration?

Core argument: Swiss voters rejected a Swiss People's Party initiative to cap the population at 10mn, from about 9.1mn today, which would have made Switzerland the first country to impose a formal population cap.

The proposal, backed by the rightwing Swiss People’s Party (SVP), would have made Switzerland the first country to impose a formal cap on its population. It sought to limit the number of residents to 10mn, from about 9.1mn today, and would have required the government to take measures to curb population growth once the population reached 9.5mn. If the population subsequently exceeded 10mn, the government would have been obliged to adopt more far-reaching measures, potentially including ending free movement of people with the EU, a cornerstone of Switzerland’s bilateral relationship with the bloc. The result represents a victory for the Swiss government, business groups and trade unions, which had argued the initiative threatened economic growth and risked undermining Switzerland’s access to foreign labour at a time of acute demographic pressures.

Takeaways by Macro Roundup® AI

  1. Swiss voters rejected a Swiss People's Party initiative to cap the population at 10mn, from about 9.1mn today, which would have made Switzerland the first country to impose a formal population cap.
  2. The rejected proposal would have required the Swiss government to curb population growth once residents reached 9.5mn, and to adopt more far-reaching measures beyond 10mn, potentially including ending free movement of people with the EU.
  3. The Swiss government, business groups and trade unions opposed the initiative, arguing it threatened economic growth and risked undermining Switzerland's access to foreign labour amid acute demographic pressures.

AI Summary. The number of recent Chinese graduates returning home to seek jobs has more than doubled in recent years, according to a report by Chinese recruiting platform Zhaopin, with the return of top technology talent carrying implications for American economic competitiveness.

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~80% of Chinese nationals who earned a doctorate from a US school btw July 2023 and June 2024 wanted to stay in the US. However, according to Chinese recruiter Zhaopin, the number of Chinese nationals seeking to return home grew 12% y/y in 2025.

Are more Chinese tech graduates returning home, weakening American competitiveness?

Core argument: The number of recent Chinese graduates returning home to seek jobs grew 12% in 2025 from the prior year and has more than doubled since 2018, according to a report by Chinese recruiting platform Zhaopin.

There’s a longstanding name within China for those going back home—“sea turtles,” a pun on the Mandarin term for overseas returnees, haigui, that also evokes female sea turtles’ instinct to return to their natal beach after years of migrating around the world’s oceans. But the trend as it relates to top tech talent today has implications for American economic competitiveness, both now and in the future. The number of recent Chinese graduates returning home to seek jobs grew 12% in 2025 from the previous year, and the figure has more than doubled since 2018, according to a report by Chinese recruiting platform Zhaopin.

Takeaways by Macro Roundup® AI

  1. The number of recent Chinese graduates returning home to seek jobs grew 12% in 2025 from the prior year and has more than doubled since 2018, according to a report by Chinese recruiting platform Zhaopin.
  2. Returnees to China are long known domestically as "sea turtles," a pun on the Mandarin term haigui that evokes female sea turtles returning to their natal beach after years migrating the world's oceans.
  3. The return of China's top tech talent carries implications for American economic competitiveness both now and in the future.

AI Summary. 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.

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Spain’s foreign-born population grew from ~5% to ~20% in less than 25 years. Since 2020, ~25% of the 1.1mm new jobs created in the EU were Spanish, and ~70% were filled by immigrants. At 1.1 births/woman, Spain has the second-lowest birth rate in the EU.

How has immigration driven Spain's economic and job growth?

Core argument: Spain accounted for one in four of the 11.1mn jobs added across the EU since 2020, according to FT analysis, and has been the world's fastest-growing large advanced economy over the past two years.

Over the past two years, Spain has been the world’s fastest-growing large advanced economy and an engine of EU job creation. Since 2020, it has been responsible for one in four of the 11.1mn new jobs added across the bloc, according to FT analysis. Roughly 70% of those have gone to immigrants, according to Funcas, a think-tank, which has examined the period since 2019. Spain’s unemployment rate remained the second highest in the EU at 10.3% in March. Juan Félix Huarte, chair of Uriel Investments, whose businesses range from waste management to renewables, says immigrants have become vital for the country’s economy for two underlying reasons. One is Spain’s fertility rate of 1.1 births per woman, the lowest in the EU after Malta and little more than half the rate of 2.1 needed to maintain demographic stability. “The Spanish, unfortunately, don’t have children. We have pets, but we don’t have children,” Huarte says. The other reason, he says, is that many young Spaniards are disinclined to take arduous jobs: “We’re getting society far too used to government assistance, to grants, to support from the state.”

Takeaways by Macro Roundup® AI

  1. Spain accounted for one in four of the 11.1mn jobs added across the EU since 2020, according to FT analysis, and has been the world's fastest-growing large advanced economy over the past two years.
  2. Roughly 70% of Spain's job gains since 2019 have gone to immigrants, according to the think-tank Funcas, while Spain's unemployment rate stood at 10.3% in March, the second highest in the EU.
  3. Spain's fertility rate of 1.1 births per woman is the lowest in the EU after Malta and little more than half the 2.1 needed for demographic stability, which Uriel Investments chair Juan Félix Huarte cites as one reason immigrants are vital to the economy.

AI Summary. A worker-quality index built from US household survey data stayed within 1% of its starting level despite a shift toward more immigrant workers, while official nonfarm business productivity rose 8.2%. Lower predicted wages among Central American arrivals were offset by European and Asian immigrants, whose predicted wages exceed the US-born average by about 20%.

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Labor productivity increased 8.2% over the 2023–2025 period, while a CPS-based measure of worker quality has stayed within 1% of its Q1 2023 level, despite significant changes in the immigrant-intensity of the labor force over the period.

Does a more immigrant-heavy workforce lower average labor productivity?

Core argument: The authors' CPS-based worker quality index stayed within less than 1% of its first quarter 2023 level across the three-year period, while BLS nonfarm business productivity rose 8.2% over the same span.

On net, the U.S. workforce became meaningfully more immigrant-heavy from 2023 to 2024 and then partially reversed, all within a three-year window. Despite these compositional changes, our CPS-based worker quality index barely moved. It hovered within less than 1% of its first quarter 2023 level throughout the entire period, while BLS nonfarm business productivity climbed 8.2% over the same span. Why would swings in workforce composition leave average productivity nearly unchanged? Two reasons. First, the shifts in employment shares by place of birth, while noticeable, are small in absolute terms. Even with a 1pp rise in the U.S. employment share of lower-productivity, Latin American-born workers moved the needle on aggregate worker quality only modestly—far less than the roughly 8% productivity gain recorded by the BLS over the period. Second, not all immigrants are less productive than U.S.-born workers. Central American immigrants—who accounted for the largest single increment of the foreign-born workforce share—earn wages that fall about 25% below the U.S.-born average. In isolation, their growing employment shares put modest downward pressure on average productivity. But workers arriving from Europe, Asia, and other high-income regions display the opposite pattern: Their predicted wages exceed the U.S.-born average by about 20%, reflecting higher educational attainment and more highly compensated occupations.

Takeaways by Macro Roundup® AI

  1. The authors' CPS-based worker quality index stayed within less than 1% of its first quarter 2023 level across the three-year period, while BLS nonfarm business productivity rose 8.2% over the same span.
  2. A 1 percentage point rise in the U.S. employment share of lower-productivity Latin American-born workers shifted aggregate worker quality only modestly, far less than the roughly 8% productivity gain recorded by the BLS.
  3. Central American immigrants, the largest single increment of the foreign-born workforce share, earn wages about 25% below the U.S.-born average, while workers from Europe, Asia, and other high-income regions have predicted wages about 20% above it.

AI Summary. Census population estimates show urban counties growing more slowly than suburbs, smaller metropolitan areas, and rural areas, with all county types slowing as immigration fell and the slowdown especially sharp in urban counties. Domestic migration is driven more by affordability, with people leaving expensive urban counties for cheaper suburbs and smaller communities.

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As immigration slowed in 2025, large urban counties’ growth continued to slow relative to that of suburban, rural and smaller urban counties. Domestic migration continued to consist of moves from expensive counties to more affordable suburban areas.

Does lower immigration slow urban county growth more than elsewhere?

Core argument: Urban counties grew more slowly in 2025 than suburban counties, smaller metropolitan areas, and rural areas, according to vintage 2025 Census population estimates.

Urban counties grew more slowly than suburban counties, smaller metropolitan areas, and rural areas in 2025. All types of counties grew more slowly in 2025 than in 2023 and 2024 because immigration fell. However, the slowdown was especially sharp for urban counties. The only other years this century when urban counties lagged all other types of places were in 2020-2022, when people moved out of cities during the pandemic, and in 2003-2006, when the housing bubble boosted housing construction in outlying suburban areas and drew new residents from cities. (This is based on vintage 2025 Census population estimates, released this morning.) Domestic migration is driven more by affordability, with people leaving expensive urban counties for more affordable suburban areas and smaller communities.

Takeaways by Macro Roundup® AI

  1. Urban counties grew more slowly in 2025 than suburban counties, smaller metropolitan areas, and rural areas, according to vintage 2025 Census population estimates.
  2. All county types grew more slowly in 2025 than in 2023 and 2024 because immigration fell, with the slowdown especially sharp for urban counties.
  3. The only other years this century when urban counties lagged all other place types were 2020–2022, amid pandemic moves out of cities, and 2003–2006, when housing-bubble construction in outlying suburbs drew residents from cities.