A Redenção de Cam - Modesto Brocos (1895)

"Caste, class, & race: a study in social dynamics" -  Oliver C. Cox (1959).

■ "Introduction to the Science of Sociology" - Robert Ezra Park and Ernest W. Burgess (1921).

■ "The Philadelphia Negro: a social study" - W. E. B. Du Bois (1899).

■ The Social Sciences and Political Science bookshelves at the Project Gutenberg.

Academic Articles

"Uses of census or survey data for the estimation of vital rates" - William Brass (1964). Paper that originated the "Brass questions".

Newspaper Articles

■ "How Did Economists Get it So Wrong" - Paul Krugman's article on the basic principles of economics. New Tork Times, September 2, 2009.

■ "Recovering From Postdoc Mistakes" - Article published in the March 18, 2011, issue of the Science Career Magazine.

Research Centers

Population Studies Center at Penn.

Brazilian Census Bureau.

Cedeplar - Centro de Desenvolvimento e Planejamento Regional at the Federal University of Minas Gerais, Brazil.

Data Sources

Demographic and Health Surveys.

■ David Lam's Brazil Research Project Resources.

The Human Mortality Database and The Human Fertility Database.

DataFerrett. - US Census Bureau's software that allows the download of various public available datasets, such as the US Censuses and the Current Population Survey.

World Health Organization Data and Statistic.

Learning Statistics

■  UCLA Stata website - resources to help you learn and use Stata.

■  Making Regression Tables in Stata: outreg2 and estout.