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.

Sam Caldis and Michelle Marcus are the S4 senior fellows for 2015-2016.

Sam Caldis

Sam Caldis is a third year Ph.D. student in Brown's Ancient History Program through the Department of History. He holds a B.A. in Latin, Greek, and Classical Civilizations from the University of Minnesota - Twin Cities, summa cum laude. His research interests lie in examining social and political change in the Roman Empire's Danubian provinces in Late Antiquity with a special focus on urbanism, migration, cross-cultural exchange, and frontier shift in Illyricum. Sam is also involved in the Southeast Europe Digital Documentation Project which seeks to integrate and expand the archaeological information from key Roman sites in Bosnia and Herzegovina, Bulgaria, Kosovo, Macedonia, Montenegro, Romania, and Serbia.


Michelle Marcus

Michelle Marcus is a fifth year Ph.D. student in Economics. She holds a B.A. and M.A. in Economics from Miami University. Michelle's research focuses on quantifying the impact of environmental exposure to harmful toxins on child and infant health. Her third year paper estimates the impact of gasoline content regulation on reducing childhood asthma in California, and her current research focuses on the impact of leaking petroleum from underground storage tanks on nearby infant health outcomes.

Recent Senior Fellows

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

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) Jessica Katzenstein (Anthropology)
Eren Arbatli (Economics) Samantha Kingsley (Epidemiology)
Maria Angelica Bautista (Political Science) Peter Klein (Sociology)
Ben Bellman (Sociology) Juyoung Lee (Sociology)
Yelena Bilerman (Political Science) Michelle Marcus (Economics)
Amanda Boston (Africana Studies) Thomas W Marlow (Sociology)
Aisalkyn Botoeva (Sociology) Kristen McCausland (Epidemiology)
Jennifer Bouek (Sociology) Jamie McPike (Sociology)
Benjamin Bradlow(Sociology) Abhilash Medhi(History)
Chenxi Cai(Economics) Sveta Milusheva (Economics)
Sam Caldis(History) Margaret Mulcahy (Sociology)
Mario Francesco Carillo(Economics) Michael Murphy(Sociology)
Gregory Casey (Economics) Aaron Niznik (Sociology)
Meg Caven (Sociology) Irene Pang (Sociology)
Laura Chilson (History of Art and Architecture) Tina M Park (Sociology)
Patrick Chung (History) Maura Pavalow (Third World Center)
Valery Danilack (Community Health) Heitor Sandes Pellegrina (Economics)
Mila Dragojevic (Political Science) Kara Pellowe-Wagstaff(Ecology and Evolutionary Biology)
Angelica Duran-Martinez (Political Science) Jorge Eduardo Perez Perez (Economics)
Pinar Durgun (Archaeology) Apollonya Porcell (Sociology)
Lia Dykstra (History of Art and Architecture) Shivaani Prakash (Community Health)
Alex Eble (Economics) Danya Qato £¨Public Health£©
Alexandra Effenberger (Economics) Diego Díaz Rioseco (Political Science)
Andrew Elzinga (Economics) Samantha Rosenthal (Community Health)
Elena Esposito (Economics) Adrian Rubli (Economics)
Eli Feiman (Political Science) Marcelo Bohrt Seeghers (Sociology)
Malay Firoz (Anthropology) Yang (Cindy) Shen (Economics)
Diego Focanti (Economics) Yibing Shen (Sociology)
Patricia Fox (Biostatistics) Milan Satcher (Public Health)
Bruno Gasperini (Economics) Tim Squires (Economics)
Jean-Yves Gerardy (Economics) Amy S Teller (Sociology)
Chris Gibson (Sociology) Optat Tengia(Sociology )
David A Glick (Economics) Andrew Tobolowsky (Religious Studies)
Rachel Goldberg (Sociology) Julia Troche (Egyptology)
Linda Gosner (Joukowsky Institute for Archaeology and the Ancient World) Ana Uribe (Economics)
Diana Graizbord (Sociology) Yashas Vaidya (Sociology)
Martin Fiszbein (Economics) Trina Vithayathil (Sociology )
Ricarda Hammer(Sociology) Marcus Walton (Political Science)
Weeam Hammoudeh (Sociology) Becca Wang (Sociology)
Myra Harbin (Political Science) Shirley Wang (Community Health)
Morgan Hardy (Economics) Lawrence Were £¨Health Services Policy & Practice£©
Esther Hernández-Medina (Sociology) Natalie Wiatrowski (Community Health)
Thandie Hlabana (Sociology) Cadence E Willse (Political Science)
Mariam Irshad (Public Health) Meghan Wilson (Political Science)
Alexis Jackson (History of Art) Di Wu (American Studies)
Karida Johnson (Sociology) Jie Yang (Community Health )
Laura Keohane (Health Services Research) Amanda Zagame (Sociology)

Alumni Fellows

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