Theme 13 of 43

Migration, Urbanization & Spatial Transformation

São Paulo alone absorbs more net migration than all other Brazilian states combined — and it takes away precisely the youngest and most qualified from wherever they leave.

CAGED, the Ministry of Labor's General Registry of Employed and Unemployed Workers, records every formal employment movement in the country — hires and layoffs, month by month, by municipality. Crossed with ANATEL's Brazilian Connectivity Index, the panel shows not only where Brazilian workers move to, but also what kind of infrastructure awaits them when they arrive. The picture that emerges is of a country with two simultaneous movements: accelerated concentration in a few metropolitan hubs and the emptying-out of the interior and the countryside.

São Paulo drains the rest of the country

São Paulo's positive net migration, as measured by CAGED, totals 574,022 people — 57% of all the positive net migration recorded in the country. Rio de Janeiro and Minas Gerais each account for 18%. Adding the three states together, only 7% of positive net migration remains distributed among all other states — most of which, in fact, are losing population to these hubs.

São Paulo alone absorbs more net migration than all other Brazilian states combined.

North and Northeast: the regions losing the most people

Within the North and Northeast, only Maranhão and Pará show positive net migration — and even then, modest: 38,824 and 31,813 respectively. Every other state in these two regions registers negative net migration: they lose, on net, more people than they receive.

Most North and Northeast states consistently lose population — Brazil's internal migration has almost a single direction: toward the Southeast.

Return migration: more promise than reality

CAGED's movement data show a continuous flow toward São Paulo, with no consistent signal of workers returning to their home states after a period in the metropolitan region. The narrative that migrants "go back home" after accumulating experience and capital in the metropolis finds no support in formal employment movement records.

The ones who migrate are the most qualified

Comparing migrants' average education level with the average in their place of origin, migrants consistently rank above the local average. The pattern is one of positive selection: it isn't just any worker who leaves, it's the most qualified worker — which worsens, rather than eases, regional inequality, because the region of origin loses precisely the human capital that could most contribute to its own development.

Poor regions lose precisely their most qualified workers — migration functions as a suction pump for human capital.

Census: cities that grow, cities that vanish

The Census shows two Brazils inside the same country. Mining municipalities grow up to 30% during an economic boom, while municipalities with a traditional agricultural profile shrink 20%. Metropolitan regions and integrated development regions (RIDEs) grow 15% at the cost of urban concentration, state capitals grow 5% driven by immigration, and municipalities undergoing environmental degradation shrink by as much as 30% — literal desertification pushing people out.

Cities grow or shrink at an accelerated pace, with no middle ground — traditional rural Brazil is undergoing two opposite fates at once: mineral boom or total emptying-out.

The country is already urban — but the interior and the countryside are emptying

São Paulo, Rio de Janeiro, and Belo Horizonte together concentrate 50 million residents and grow 2% a year. The other state capitals add up to 30 million, growing 1.5% a year. The interior, with 90 million residents, grows only 0.5% a year — a much slower pace — and the rural population, at 28 million, shrinks 1% a year. More than 80% of the Brazilian population already lives in urban areas, but within that urban universe itself, concentration keeps growing in the big metros and withering in the interior.

Eighty percent of the Brazilian population is already urban — but the interior grows slowly and the countryside loses people every year.

International migration: a brain drain out of the country

About 3.4 million Brazilians live abroad today. The United States holds the largest contingent, with 1.8 million, followed by Portugal (800,000), Paraguay (500,000), and the United Kingdom (300,000). Far from being just extended tourism or retirement abroad, the flow carries a significant component of qualified workers seeking opportunities the Brazilian market doesn't offer.

3.4 million Brazilians live outside the country — a brain drain that adds to, and resembles, the same positive selection observed in internal migration.

Who stays and who leaves, according to the Continuous PNAD

Migrants average 28 years of age against 38 for those who stay; 11 years of education against 8; income of 3.5 minimum wages against 2.1; and a formality rate of 55% against 42%. The pattern repeats at every scale of the Brazilian migration phenomenon, whether internal or international: those who leave are younger, more educated, and hold more formal jobs — a success-selected slice that worsens the inequality between those who leave and those who stay.

Those who migrate are younger, more educated, and more formally employed than those who stay — a success selection bias that repeats at every scale of the Brazilian migration phenomenon.

Explanatory hypotheses

The cumulative-advantage hypothesis explains the movement observed: already-rich regions attract more investment, which generates more jobs, which attracts more qualified people — a self-reinforcing cycle. Brain-drain theory explains why peripheral regions systematically lose their most capable workers, both through internal and international migration. The gender breakdown shows that women migrate proportionally more into service occupations and domestic work, historically feminized sectors of the labor market. And the scale of the international talent drain suggests that Brazil today cannot offer sufficient conditions to retain a significant share of its most qualified workforce.

Policy implications

Economic deconcentration policies could reduce migratory pressure toward the Southeast's three major metros. Investment directed at the interior tends to retain local talent instead of pushing it toward metropolitan hubs. Mid-sized cities, in the 500,000 to 1 million resident range, could function as alternative regional development hubs, redistributing population without further overloading the capitals. Retention programs for scientists and researchers at interior universities could reduce part of the brain drain. And remote work, as a tool for decentralization, could let qualified workers stay outside major centers without giving up professional opportunity.