People >> S4 Fellows  

The S4 Fellows program provides recognition to Brown graduate students who are developing skills in spatial analysis and GIS tools. The first Fellows were the graduate students and post-docs that completed the inaugural S4 GIS Institute. Now the program recognizes students who have received training from other sources and have an expressed interest in continuing to use and develop these skills.

Fellows come from a diverse set of departments and programs at Brown including representatives from the Social, Natural, and Medical Sciences as well as the Humanities. They naturally become consultants for other students in their home departments, and they sometimes assist in S4's GIS Institute or other training activities. To learn more about S4 GIS Institute, click here.


Senior Fellows

Occasionally S4 will select a doctoral student to serve for a year as a Senior Fellow in recognition of their contribution to GIS training, research, and outreach. We will select Senior Fellows on the basis of their participation in S4 events, their assistance in training and workshop activities, and their expertise and commitment to high quality spatially informed research. S4 relies heavily on networking and consulting relationships among our students, and designation as a Senior Fellow is an acknowledgement of the key role that our most active students play in the program.

Tim Squires is the S4 senior fellow for 2013-2014.


Tim Squires

Tim Squires is a third year Ph.D. student in Economics. He holds a B.S. in Economics from Quinnipiac Univeristy. His interests lie in the impact of government programs on the growth of third world countries. In his first years here he worked on looking at the spatial impact of Malaria on economic activity across the entire globe. In his dissertation research he plans to look at malaria, geography and electricity's impact on Economic activity. He is currently looking at the impact of rural electrification on wages, education and health in Honduras.

Recent Senior Fellows

Diana Graizbord
Marcelo Bohrt Seeghers
Hongwei Xu
Amy Kracker
Sze Liu
Epidemiology, Community Health
Adam Storeygard
Weiwei Zhang

Amy is a 4th year graduate student in the PhD program in sociology. Her research focuses on the spatial implications of urban governance regimes. Specifically, her work examines the varied successes of municipal governments in both Cape Town and Johannesburg, South Africa in addressing the history of spatial and racial inequality in the provision of basic household services inherited from apartheid. This work takes into account variation in relationships between local government and civil society actors as well as intra-governmental dynamics in creating more equitable patterns of service delivery. At the 2008 meeting of the Association of American Geographers, Amy presented on another research project examining the relationship between the racial composition of neighborhoods in New Orleans and the potential for exposure to toxins. She also recently taught an introductory workshop in spatial methods and GIS at the University of the Witwatersrand in Johannesburg, South Africa. At Brown, she is affiliated with S4 as well as the Watson Institute for International Studies.

Sze (Sam) Liu is a 3rd year student in the PhD program in Epidemiology where she is funded on a National Institute of Aging predoctoral fellowship. In addition, she is completing a second master¡¯s degree in Sociology. Sam¡¯s research interests include health disparities from a life-course perspective, neighborhood effects, and spatial analysis. At the 2007 American Public Health Association annual meeting she presented on neighborhood characteristics associated with hospital readmissions for pediatric asthma in Rhode Island and residential modifications and physical decline among community-dwelling elderly. Sam also completed a summer internship at the NYC DOHMH World Trade Center Registry Spatial Analysis Unit in 2007.

Adam Storeygard is a graduate student in economics, focusing on empirical urban and development economics. His work reflects a longstanding interest in spatial patterns and processes. Before arriving at Brown, he was at the Center for International Earth Science Information Network (CIESIN) at Columbia University, where he participated in several mostly spatially-oriented population-environment and global health research and data development projects, co-authoring papers that have appeared in journals including Nature and the Bulletin of the World Health Organization. He also assisted in the development and teaching of spatial data analysis training workshops in New York and co-taught one in Germany. Adam has an M Phil in Environment and Development from the University of Cambridge and a BA from Harvard University in physics. At Brown, he is also affiliated with the Population Studies and Training Center.

Weiwei Zhang is a 2nd year graduate student in Sociology. Her primary research interests include immigration assimilation and race/ethnic relations in the U.S. from both substantive and methodological perspectives. Her training at Brown in spatial and other quantitative methods has led to numerous applications using these methods. At the 2008 annual meeting of the Population Association of America, she will present a study using the 2000 U.S. Census of the impact of recent immigration on existing residential patterns. She is also working on historical racial/ethnic residential segregation in U.S. cities using the 1880 Census. At Brown, she is affiliated with both S4 and the Population Studies and Training Center.

Hongwei is a 6th year graduate student in the PhD program in sociology. His research focuses on spatial inquiries into population dynamics. Specifically, he examines how spatial features including scale, proximity, and boundary are related to demographic and population health processes such as residential segregation, exposure to health risks, and disease diffusion. His dissertation uses individual location data to identify ethnic neighborhoods using Bayesian spatial methods, and then incorporates neighborhood as a predictor of child mortality in Newark, New Jersey, in 1880. Other ongoing work links county-level contextual information to the individual-level data of National Longitudinal Survey of Youth and examines the longitudinal association between spatially measured degree of segregation and individuals' risk of obesity during 1981-2008. Hongwei is also interested in developing and applying new techniques to solve methodological challenges such as spatial autocorrelation, misalignment, and scale-dependency in spatial modeling.

Current Fellows

Alexei Abrahams (Economics) Samantha Kingsley (Epidemiology)
Eren Arbatli (Economics) Peter Klein (Sociology)
Andrea Austin (Community Health) Shiva Koohi (Economics)
Mongoljin Batsaikhan (Economics) Heather Lee (American Studies)
Maria Angelica Bautista (Political Science) Juyoung Lee (Sociology)
Yelena Bilerman (Political Science) Kristen McCausland (Epidemiology)
Aisalkyn Botoeva (Sociology) Jamie McPike (Sociology)
Jennifer Bouek (Sociology) Sveta Milusheva (Economics)
Chenxi Cai(Economics) Claudia Moser (Joukowsky Institute )
Sam Caldis(History) Margaret Mulcahy (Sociology)
Mario Francesco Carillo(Economics) Michael Murphy(Sociology)
Gregory Casey (Economics) Aaron Niznik (Sociology)
Meg Caven (Sociology) Bernard Onyango (Sociology)
Thomas Chen (American Civilization) Irene Pang (Sociology)
Paul Christian (Economics) Tina M. Park (Sociology)
Valery Danilack (Community Health) Maura Pavalow (Third World Center)
Emilio Depetris-Chauvin (Economics) Heitor Sandes Pellegrina (Economics)
Mila Dragojevic (Political Science) Kara Pellowe-Wagstaff(Ecology and Evolutionary Biology)
Sean Dinces (American Studies) Jorge Eduardo Perez Perez (Economics)
Angelica Duran-Martinez (Political Science) Apollonya Porcell (Sociology)
Alex Eble (Economics) Shivaani Prakash (Community Health)
Alexandra Effenberger (Economics) Danya Qato £¨Public Health£©
Andrew Elzinga (Economics) Samantha Rosenthal (Community Health)
Jon Ericson (Cognitive, Linguistic, and Psychological Sciences) Adrian Rubli (Economics)
Elena Esposito (Economics) Gabriela Sanchez-Soto (Sociology/PSTC )
Eli Feiman (Political Science) Marcelo Bohrt Seeghers (Sociology)
Diego Focanti (Economics) Milan Satcher (Public Health)
Patricia Fox (Biostatistics) Heather Silber (Political Science )
Bruno Gasperini (Economics) Tim Squires (Economics)
Chris Gibson (Sociology) Optat Tengia(Sociology )
Rachel Goldberg (Sociology) Andrew Tobolowsky (Religious Studies)
Diana Graizbord (Sociology) Julia Troche (Egyptology)
Martin Fiszbein (Economics) Ana Uribe (Economics)
Ricarda Hammer(Sociology) Yashas Vaidya (Sociology)
Weeam Hammoudeh (Sociology) Trina Vithayathil (Sociology )
Morgan Hardy (Economics) Marcus Walton Political Science)
Myra Harbin (Political Science) Shirley Wang (Community Health)
Esther Hernández-Medina (Sociology) Lawrence Were £¨Health Services Policy & Practice£©
Thandie Hlabana (Sociology) Natalie Wiatrowski (Community Health)
Alexis Jackson (History of Art) Meghan Wilson (Political Science)
Karida Johnson (Sociology) Di Wu (American Studies)
Laura Keohane (Health Services Research) Jie Yang (Community Health )

Alumni Fellows

Daniel Acevedo (Computer Science) Kathleen Millar (Anthroplogy)
Erik Anderson (History) Elisabeta Minca (Sociology)
Cemal Arbatli (Economics) Eduardo Moncada (Political Science)
Andrew Arnaud (Community Health) Erica Mullen (Sociology)
Kelly Bay (Political Science) Omer Ozak Munoz (Economics)
Justin Buszin (Sociology) Elizabeth Murphy (Joukowsky Institute for Archaeology)
Lucas Carr (Community Health ) Sookhee Oh (S4)
Alexis Cerda (Economics, Arizona State University) Gareth Olds (Economics)
Michelle Charest (Anthropology) EeCheng Ong (Economics)
Sreeparna Chattopadhyay (Anthropology) Ying Pan (Economics)
Jessica Cigna (Public Policy) Erin Parker (Sociology)
Orly Clerge (Sociology) Omar Pereyra (Sociology)
Alissa Cordner (Sociology) Ravi Perry (Political Science)
Jennifer Darrah-Okike (Sociology) Mim Plavin (Sociology )
Thomas Devaney (History) Dimitra Politi (Economics)
Julia Drew (Sociology/PSTC) Roland Pongou (Economics )
Ruben Durante (Economics) Christine Reiser (Anthropology )
Nicholas Everage (Community Health) Gabriel Rosenberg (History )
Yiping Fang (S4) Daniel Schensul (Sociology )
Sara Fingal (History) Nathan Schiff (Economics )
Tiago Freire (Economics) Sheetal Sekhri (Economics)
Laura Gast (Public Health) Amy Kracker Selzer(Sociology)
Laureno Gheralrdi (Ecology and Evolutionary Biology) Laura Senier (Sociology )
Tatiana Giovanelli Gottlieb (History) Gayatri Singh (Sociology)
Alison Hart (Public Policy) Laura Smith (Epidemiology,Community Health )
Moshi Herman (Sociology) Samantha Sterns (Community Health)
Alaka Holla (Economics) Adam Storeygard (Economics)
Sukriti Issar (Sociology) Harris Solomon (Anthropology)
Alice Klima (History of Art and Architecture) Inku Subedi (Sociology)
Lisbeth Trille G. Loft (Sociology) Keffie Weiss (Joukowsky Institute for Archaeology)
Yongsuk Lee (Economics) Jing Song (Sociology )
Shruti Majumdar (Sociology) Carolyn Swan (Joukowsky Institute for Archaeology and the Ancient World)
Robert Malayev (Sociology) Dikshya Thapa (Sociology)
Katherine Marino (Joukowsky Institute ) Sailesh Tiwari (Economics
Amy Marks (Psychology) Jason Urbanus (Joukowsky Institute)
Heidi Marsella (Public Policy) Zhi Wang (Economics)
Angelica Martinez ( Political Science) Hongwei Xu (Sociology )
Stylianos Michalopoulos (Economics ) Myung Ji Yang (Sociology )