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nto a scientific approach of social research. After graduating with a doctoral degree from Harvard, he accepted a teaching position Wilberforce University, a college for black students in Ohio. In 1896, with a doctoral degree and two years as a college instructor he accepted a fellowship at the University of Pennsylvania to conduct a research project in Philadelphia's slums. Between 1890 and 1910, approximately 200,000 black people migrated to northern cities. Thes

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