Research

re·search AmE /rɪˈsɝːtʃ/ · BrE /rɪˈsɜːtʃ/ noun Systematic inquiry into population change — fertility, mortality, and migration — to explain how age structure and social institutions evolve across time and place.

Migration estimates, Brazil 1960–1980

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Between 1960 and 1980, rural Brazil lost 26 million people to its cities. The Northeast alone shed 4.5 million residents over the two decades, and São Paulo absorbed 4.4 million. Paraná — once a magnet for settlers in the 1960s — reversed course and lost 1.2 million in the 1970s, while Rondônia’s frontier towns experienced a 53% net migration rate. These shifts transformed the country.

This project estimates net migration by sex, five-year age group, and urban/rural residence for all Brazilian states over 1960-1970 and 1970-1980 (Fernandes & Carvalho, 2024). The full dataset of estimates (more than 6,500 observations) is publicly available.

COVID-19 vaccination & age reporting, Brazil

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Brazil administered 388 million COVID-19 vaccine doses. This study examines the quality of age reporting in the national vaccination database—comparing 387 million records with census data, demographic projections, and high-quality data from Sweden.

This project provides the R code and reference data for the first study comparing population estimates for the oldest old using administrative vaccination data and census data in Brazil (Turra et al., 2023).