Amber DeJohn

Assistant Professor of Geography and Public Health, CDPH Faculty & Associate of the Pepper Institute on Aging and Public Policy

Department

Department of Geography

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Biography

I am a health geographer interested in the geographies of aging, which I study through transport accessibility modeling, spatial data analysis, and place-based methods. My research examines how the built environment shapes lifelong health and well-being, with a particular focus on mobility and technology use in later life.

Currently, my work centers on identifying spatial disparities in access to care services and understanding their implications for quality of life among affected populations.

Selected Publications

BMC Public Health25(1), Article 513
Mobility, ICT, and health: a built environment investigation of older Chinese migrants' social isolation and loneliness
DeJohn, A., Liu, B., Ma, X., Widener, M. J., & Liu, Z. (2025)
DOI
Canadian Geographies / Geographies canadiennes69(1), e12961
Alone together? A time use approach for examining socializing when travel is limited
DeJohn, A., Liu, B., Ma, X., Widener, M. J., & Liu, Z. (2024)
DOI
Journal of Transport and Land Use15(1), 95-116
Calculating place-based transit accessibility: Methods, tools and algorithmic dependence
Higgins, C. D., Palm, M., DeJohn, A., Xi, L., Widener, M. J., Vaughan, J., Miller, E. J., & Farber, S. (2022)
DOI
The Professional Geographer75(1), 76-89
Transit access to subsidized food stores in the U.S. Midwest
DeJohn, A. D., Widener, M. J., & Shannon, J. (2023)
DOI

Mobility, ICT, and health: a built environment investigation of older Chinese migrants' social isolation and loneliness

Alone together? A time use approach for examining socializing when travel is limited

Calculating place-based transit accessibility: Methods, tools and algorithmic dependence

Transit access to subsidized food stores in the U.S. Midwest