IPUMS International Team


Research Scientist
Sula Sarkar photo

IPUMS Data Projects

IPUMS International

Research Interests and Project Expertise

Geographic harmonization; Geographical Information Systems (GIS); historical demography; mapping and data visualization


My association with ISRDI (formerly Minnesota Population Center) began in 2001 when I started working as a graduate research assistant on the National Historical GIS project while pursuing a degree in geography at the University of Minnesota. After completing my PhD in 2006, I became a full-time employee working on international census microdata projects.

As a geographer, I study the changing administrative boundaries from one census year to another. My work at ISRDI mostly deals with harmonizing this changing geography and creating a consistent geographical footprint across time and space. Besides administrative boundaries and census microdata, I produce GIS maps that can be used for mapping and visualizing IPUMS-International and IPUMS-DHS data. My research interests include visualization of census microdata from several countries with special focus on migrants and immigrants

Selected Works

Sarkar, S., Cleveland, L., Silisyene, M. and Sobek, M. 2016. Harmonized Census Geography and Spatio-temporal Analysis: Gender Equality and Empowerment of Women in Africa. ISRDI Working paper #2016-3

Sarkar, S. and Hall, P.K. 2011. Mapping NAPP: Examples of Spatial Analysis of Nineteenth-Century Migration in the North Atlantic Countries Using NAPP Data. Historical Methods, 44: 25-36. ID: 58619054

Ruggles, S., Roberts, E., Sarkar, S. and Sobek, M. 2011. The North Atlantic Population Project: Progress and Prospects. Historical Methods, 44:1-6 ID: 58619058

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