Natural Experiments in Planning Research: Opportunities,Challenges,and Future Directions

Althoff Tim Ivanovic Branislav Hicks Jennifer L. Delp Scott L. King Abby C. Leskovec Jure . 2024. “Countrywide Natural Experiment Reveals Impact of Built Environment on Physical Activity.” arXiv preprint arXiv:2406.04557.

Bulkeley Harriet Marvin Simon Palgan Yuliya V. McCormick Kes Breitfuss-Loidl Michaela Mai Linjun Frantzeskaki Niki . 2019. “Urban Living Laboratories: Conducting the Experimental City?” European Urban and Regional Studies 26 (4): 317–35.

Caprotti Federico Cowley Robert . 2017. “Interrogating Urban Experiments.” Urban Geography 38 (9): 1441–50.

Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion. 2025. “PRC Special Interest Projects.” Last modified January 30, 2025. https://www.cdc.gov/prevention-research-centers/php/special-interest-projects/index.html.

Clevenger Samuel M. Andrews David L. 2017. “‘A Peaceful Path to Healthy Bodies’: The Biopolitics of Ebenezer Howard’s Garden City.” Urban Planning 2 (4): 5–9.

Craig Peter Campbell Mark Deidda Matteo Dundas Ruth Green Judith Vittal Katikireddi Srinivasa White Michael . 2025a. “Using Natural Experiments to Evaluate Population Health Interventions: A Framework for Producers and Users of Evidence.” Public Health Research 13 (3): 1–59.

Craig Peter Campbell Mark Deidda Matteo Dundas Ruth Green Judith Vittal Katikireddi Srinivasa White Michael . 2025b. “Using Natural Experiments to Evaluate Population Health and Health System Interventions: New Framework for Producers and Users of Evidence.” BMJ 388:e080505.

Craig Peter Cooper Clare Gunnell David Haw Sally Lawson Kate Macintyre Sally Thompson Stephen . 2012. “Using Natural Experiments to Evaluate Population Health Interventions: New Medical Research Council Guidance.” Journal of Epidemiology and Community Health 66 (12): 1182–86.

Craig Peter Katikireddi Srinivasa V. Leyland Alex Popham Frank . 2017. “Natural Experiments: An Overview of Methods, Approaches, and Contributions to Public Health Intervention Research.” Annual Review of Public Health 38 (1): 39–56.

Crane Melanie Bohn-Goldbaum Erika Grunseit Anne Bauman Adrian . 2020. “Using Natural Experiments to Improve Public Health Evidence: A Review of Context and Utility for Obesity Prevention.” Health Research Policy and Systems 18 (1): 48.

Currie Janet Walker Reed . 2011. “Traffic Congestion and Infant Health: Evidence from E-ZPass.” American Economic Journal: Applied Economics 3 (1): 65–90.

Davidson Joshua Stephanie H. Nam J. Shriya Karam Megan Ryerson S. 2026. “Cycling in a Crisis: Employing Quasi-Experimental Designs to Estimate the Effects of Provisional Bicycle Infrastructure.” Journal of Planning Education and Research 46 (1): 53–71.

Emmons Karen M. Doubeni Chyke A Fernandez Maria E. Miglioretti Diana L. Samet Jonathan M. 2018. “National Institutes of Health Pathways to Prevention Workshop: Methods for Evaluating Natural Experiments in Obesity.” Annals of Internal Medicine 168 (11): 809-814.

Evans James Karvonen Andrew Raven Rob . 2016. “The Experimental City: New Modes and Prospects of Urban Transformation.” In The Experimental City, edited by Evans James Karvonen Andrew Raven Rob 1–12. London: Routledge.

Freemark Yonah . 2019. “Upzoning Chicago: Impacts of a Zoning Reform on Property Values and Housing Construction.” Urban Affairs Review 56 (1): 75–108.

Friedman Michael S. Powell Kathleen E. Hutwagner Larry Graham L. M. Teague W. G. 2001. “Impact of Changes in Transportation and Commuting Behaviors during the 1996 Summer Olympic Games in Atlanta on Air Quality and Childhood Asthma.” JAMA 285 (7): 897–905.

Goodman Anna Sahlqvist Sarah Ogilvie David Consortium iConnect . 2014. “New Walking and Cycling Routes and Increased Physical Activity: One- and Two-Year Findings from the UK iConnect Study.” American Journal of Public Health 104 (9): e38–46.

Heinen Eva Panter James Mackett Roger Ogilvie David . 2015. “Changes in Mode of Travel to Work: A Natural Experimental Study of New Transport Infrastructure.” International Journal of Behavioral Nutrition and Physical Activity 12 (1): 81.

Honey-Rosés Jordi . 2019. “A Review of Field Experiments in Planning and Urban Research.” Planning Practice & Research 34 (5): 558–72.

Honey-Rosés Jordi Stevens Mark . 2019. “Commentary on the Absence of Experiments in Planning.” Journal of Planning Education and Research 39 (3): 267–72.

Howard Ebenezer . 1898. Garden Cities of To-Morrow. London: Swan Sonnenschein & Co., Ltd.

Kraus Sebastian Koch Nicolas . 2021. “Effect of Pop-Up Bike Lanes on Cycling in European Cities.” Proceedings of the National Academy of Sciences 118 (15): e2024399118.

Leape Jonathan . 2006. “The London Congestion Charge.” Journal of Economic Perspectives 20 (4): 157–76.

Lee Chanam Newman Galen Jourdan Dawn Ye Xiangjie Van Zandt Shannon . 2022. “Natural Experiments in Planning Research.” Journal of Planning Education and Research 42 (1): 6–8.

Lu Daming Zhang Wenjia Ong Paul M. Kwan Mei-Po Xie Senkai . 2026. “The Network Spillover Effects of Metro Expansion on Metro Usage: A Quasi-Experimental Analysis in Shenzhen, China.” Journal of Planning Education and Research 46 (1): 72–87.

MacDonald John M. Stokes Robert J. Cohen Deborah A. Kofner Aaron Ridgeway Greg . 2010. “The Effect of Light Rail Transit on Body Mass Index and Physical Activity.” American Journal of Preventive Medicine 39 (2): 105–12.

Macfadyen Neil . 2013. Health and Garden Cities. London: Town and Country Planning Association.

Panter Jenna Heinen Eva Mackett Roger Ogilvie David . 2016. “Impact of New Transport Infrastructure on Walking, Cycling, and Physical Activity.” American Journal of Preventive Medicine 50 (2): e45–53.

Petticrew Mark Cummins Stephen Ferrell Chris Findlay Alan Higgins Cathy Hoy Christine Sparks Leigh . 2005. “Natural Experiments: An Underused Tool for Public Health?” Public Health 119 (9): 751–57.

Roaf Emily Larrington-Spencer Hannah Lawlor Ellen R. 2024. “Interventions to Increase Active Travel: A Systematic Review.” Journal of Transport & Health 38:101860.

Scholl Christian de Kraker Joop . 2021. “Urban Planning by Experiment: Practices, Outcomes, and Impacts.” Urban Planning 6 (1): 156–60.

Smeds Emilia Papa Enrica . 2023. “The Value of Street Experiments for Mobility and Public Life: Citizens’ Perspectives from Three European Cities.” Journal of Urban Mobility 4:100055.

Sohoni Srirang Lee Bumsoo 2026. “Parking the Minimum Parking Requirement: Evidence from Nine U.S. Cities.” Journal of Planning Education and Research 46 (1): 88–101.

Song Yang Lee Chanam Noh Youngre Li Wei Lee Hanwool . 2026a. “Bus Rapid Transit Impact on Property Prices: Comparing Two Natural Experiments in El Paso, TX.” Journal of Planning Education and Research 46 (1): 40–52.

Song Yang Zhong Sinan Lee Chanam Xu Minjie . 2026b. “Causal Effect of New Bus Rapid Transit on Non-Work-Related Activities.” Journal of Planning Education and Research 46 (1): 25–39.

Voytenko Yuliya McCormick Kes Evans James Schliwa Gabriele . 2016. “Urban Living Labs for Sustainability and Low Carbon Cities in Europe: Towards a Research Agenda.” Journal of Cleaner Production 123:45–54.

Westenhöfer Jana Nouri Ehsan Reschke Marie L. Seebach Fabian Buchcik Jan . 2023. “Walkability and Urban Built Environments—A Systematic Review of Health Impact Assessments (HIA).” BMC Public Health 23 (1): 518.

Widita Alyas Welch Timothy Rukmana Deden Diwangkari Andyan . 2026. “Impact of the MRT Jakarta on Congestion: Evidence from a Before–After, Treatment–Control Evaluation.” Journal of Planning Education and Research 46 (1): 11–24.

Wimbadi R. W. Djalante Riyanti Mori Akihiro . 2021. “Urban Experiments with Public Transport for Low Carbon Mobility Transitions in Cities: A Systematic Literature Review (1990–2020).” Sustainable Cities and Society 72:103023.

Zhang Wenjia Li Yixuan Zhou Lin Fang Chenyu . 2026. “Quasi-Experimental Analysis of COVID-19 Effects on Older versus Younger Adults’ Travel Behavior: The Moderating Role of the Built Environment.” Journal of Planning Education and Research 46 (1): 102–20.