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Historical redlining and park use during the COVID-19 pandemic: Evidence from big mobility data

Journal of Exposure Science & Environmental Epidemiology (2023)Cite this article

Abstract

Background

Despite the health benefits of urban green space, disparities in its access and use have long existed. Emerging evidence suggests an adverse impact of redlining, a discriminatory practice decades ago, on multiple health outcomes. However, whether and to what degree redlining contributes to these disparities remains unknown particularly during a pandemic. With newly available mobility data tracking the locations of large numbers of mobile devices, this study links historical redlining with changes in green space use during the COVID-19 pandemic.

Objective

This study examines how changes in park visits during the lockdown period (3/23/2020–8/2/2020) are associated with redlining across census tracts in three large U.S. cities.

Methods

HOLC neighborhood redlining grade data were merged with SafeGraph mobility data at census tract level for New York City, Chicago, and Philadelphia. Ordinary Least Square regressions were conducted to assess the association between dominant redlining grade and relative change in park visits in census tracts by comparing the lockdown period to the reference period. Spatial error and lag models were also used to account for potential spatial autocorrelation.

Results

Park visits during the lockdown period in 2020 decreased by at least one-third in the three cities. The influence of redlining varied across neighborhoods and cities. In New York City, neighborhoods with more redlined areas experienced the largest drop, sharper decreases concentrated in neighborhoods previously graded as “best” or “still desirable” in Philadelphia, but the effect was barely present in Chicago. In addition, changes in park visits are positively correlated between neighborhoods in New York City and Chicago, but it’s not observed in Philadelphia.

Impact Statement

  • Using emerging big mobility data, our study revealed large drops in park visits, a better measure than commonly-used access measures in capturing green space exposure, during the lockdown period. We found that historical redlining has a lasting impact on current green space use. More decreases in park visits were observed in the redlined areas in New York City, but patterns vary by neighborhood and city due to local-specific neighborhood dynamics. And changes in park visits were spatially, positively correlated across places.

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Fig. 1: Spatial distribution of neighborhood redlining grade and dominant redlining category in census tracts.
Fig. 2: Park visits per 10,000 people by dominant redlining category at census tract level before and during the pandemic lockdown period.

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Data availability

The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Funding

This research is supported by the University at Albany President’s COVID-19 and Minority Health Disparities Seed Funding Program [88826-1-1162929, 2021] and the American Heart Association (grant 19TPA34830085).

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Authors and Affiliations

  1. Department of Sociology, University at Albany, State University of New York, Albany, NY, USA

    Yuanfei Li

  2. Department of Geography and Planning, University at Albany, State University of New York, Albany, NY, USA

    Youqin Huang & Rui Li

  3. Center for Social and Demographic Analysis, University at Albany, State University of New York, Albany, NY, USA

    Youqin Huang

  4. Department of Environmental Health Sciences, School of Public Health, University at Albany, State University of New York, Rensselaer, NY, USA

    Kai Zhang

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Contributions

YL: Data curation, Formal analysis, Visualization, Writing - original draft; YH: Conceptualization, Funding acquisition, Methodology; RL: Conceptualization, Methodology, Resources; KZ: Conceptualization, Investigation, Methodology, Project administration, Resources, Writing – original draft, Supervision, Validation.

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Correspondence to Kai Zhang.

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Li, Y., Huang, Y., Li, R. et al. Historical redlining and park use during the COVID-19 pandemic: Evidence from big mobility data. J Expo Sci Environ Epidemiol (2023). https://doi.org/10.1038/s41370-023-00569-3

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