Research

Peer-reviewed publications (most recent listed first)

Notes: + Equal authorship, * Current student/alumnus

Urban sustainability and public health

  1. Ngo, N.S., Zou, Z., Yang, Y., and Wei, E.* (2024) “The impact of vehicle miles traveled and urban form on air pollution”, Transportation Research Interdisciplinary Perspectives, 28, 101288.
  2. Ngo, N.S. and Bashar, S.* (2024) “The impacts of extreme weather events on U.S. public transit ridership”, Transportation Research Part D: Transport and Environment, 137, 104504.
  3. Ngo, N.S. and Anand, K.* (2024) “Affordable transportation access to treatment for opioid use disorder”, Transport Policy, 156, p. 152-163.
  4. Krishnamurthy, C.K.+ and Ngo, N.S.+ (2024) “The effects of ride-hailing services on freeway congestion and air quality: Evidence from Uber in California”, Journal of the Association of Environmental and Resource Economists, 11, 6.
  5. Ngo, N.S., Martin, A.* (2023) “The coronavirus lockdowns affect bus ridership, bikesharing, and equity in a small U.S. county,” Journal of Public Transportation, 25, 100065.
  6. Ngo, N.S., Gotschi, T., and Clark, B.Y (2021) “The effects of ride-hailing services on bus ridership in a medium-sized urban area using micro-level data: Evidence from the Lane Transit District”, Transport Policy, 105, p. 44-53.
  7. Krishnamurthy, C.K.+ and Ngo, N.S.+ (2020) “The effects of smart-parking on transit and traffic: Evidence from SFpark,” Journal of Environmental Economics and Management, 99, 102273.
  8. Ngo, N.S. (2019) “Urban Bus Ridership, Income, and Extreme Weather Events,” Transportation Research Part D: Transport and Environment, Disasters & Resilience section, 77, p. 464-475.
  9. Ngo, N.S., Asseko, S.*, Obiang, M., Allo’o Allo’o, S.M., and Hystad, P. (2019) “The relationship among PM2.5, traffic emissions, and socioeconomic status: Evidence from Gabon using low-cost, portable air quality monitors,” Transportation Research Part D: Transport and Environment, SI: Urbanization, Transportation, and Air Quality in Developing Countries, 68, p. 2-9.
  10. Gatari, M.J., Kinney, P.L., Yan, B., Sclar, E., Volavka-Close, N., Ngo, N.S., Gaita, S.M., Law, A., Ndiba, P., Gachanja, A., Graeff, J., Chillrud, S.N. (2019) “High airborne black carbon concentrations measured near roadways in Nairobi, Kenya” Transportation Research Part D: Transport and Environment, SI: Urbanization, Transportation, and Air Quality in Developing Countries, 68, p. 99-109.
  11. Ngo, N.S., Bao, X., and Zhong, N. (2018) “Local pollutants go global: The impacts of intercontinental air pollution from China on morbidity in California,” Environmental Research, 165, p. 473-483
  12. Ngo, N.S., Zhong, N., and Bao, X. (2018) “The effects of transboundary air pollution following major events in China on air quality in the U.S.: Evidence from Chinese New Year and sandstorms,” Journal of Environmental Management, 212, 15, p. 169-175.
  13. Ngo, N.S. (2017) “Transit buses, emission standards, and infant health,” Journal of Policy Analysis and Management, 36, 4, p.773-789.
  14. Ngo, N.S., Kokoyo, S., and Klopp, J. (2017) “Why Participation Matters for Air Quality Studies: risk perceptions, understandings of air pollution and mobilization in a poor neighborhood in Nairobi, Kenya,” Public Health, 142, 177-185.
  15. Ngo, N.S. and Horton, R. (2016) “Climate change and fetal health: The impacts of exposure to extreme temperatures in New York City,” Environmental Research, vol. 144, p. 158-164.
  16. Ngo, N.S. (2015) “Analyzing the relationship between bus pollution policies and morbidity using a quasi-experiment,” Medicine, vol. 94, issue 37.
  17. Ngo, N.S., Gatari, M.J., Yan, B., Chilrud, S., Bouhamam, K., and Kinney, P. (2015) “Occupational exposure to roadway emissions and inside informal settlements in sub-Saharan Africa: A pilot study in Nairobi, Kenya” Atmospheric Environment, 111, p. 179-184.
  18. Kinney, PL, Gatari, M., Volavka-Close, N., Ngo, N., Ndiba, PK., Law, A., Gachanja, A., Mwaniki, S., Chillurd, SN., Scalar, E. (2011) “Traffic Impacts on PM2.5 Air Quality in Nairobi, Kenya,” Environmental Science and Policy, 14, p. 369-78.
  19. Ngo N.S. and Pataki D.E. (2008) “The energy and mass balance of Los Angeles County.” Urban Ecosystems, 11, 2, 121-139.

Diversity in STEM fields

  1. Schlatterer, J., Stockard, J., Ngo, N.S., and Lewis, P. (2025) “Plans and Experiences of Postdoctoral Scholars in the Chemical Sciences.” Journal of Chemical Education. https://doi.org/10.1021/acs.jchemed.5c00390

Peer-reviewed book chapters

Mateus Humberto, Guy-Obain Bigoumou Moundounga, Nicole S. Ngo, Sigride V. J. Asseko*, and Daniel Santini (2026) “Effects of Fare-Free Public Transport (FFPT) policies on extended mobility and urban access in Libreville, Gabon” for Extended Mobility for the City as a Common: Furthering the right to the city in global perspective (Editors: Lucia Capanema-Alvares and Romulo Orrico)

Papers under review and working papers

“Does aggressive policing worsen infant health disparities? Evidence from ‘Stop and Frisk’ in New York City” (with James Rising) (revise & resubmit at Social Science & Medicine)

“The relationship between micromobility programs and public transit ridership in the U.S.” (with Chandra K. Krishnamurthy) (revise and resubmit at Transportation Research Part D: Transport and Environment)

“The long-term effects of the COVID-19 pandemic on women scientists” (with Jean Stockard, Gianna Linares*, Megan Tuleya*, Wren Ganey*, and Priscilla Lewis) (revise & resubmit at Journal of Women and Minorities in Sciences and Engineering)

“The Declining Likelihood of Completing the PhD in Chemical Sciences: The Role of Graduate School Experiences” (with Jean Stockard, Joerg Schlatterer and Priscilla Lewis) (reject and resubmit at Journal of Chemical Education)

“Governance Challenges for Sustainable and Equitable Rapid Urban Development: A Case Study of Bangladesh’s Transportation System” (with Shahinur Bashar*) (under review)

“The proximity of public transit to Medicare providers in the U.S.” (under review)

“The COVID-19 Pandemic and PhD Students in the Chemical Sciences: Influences on Degree Completion and Commitment to the Field” (with Jean Stockard, Joerg Schlatterer and Priscilla Lewis) (under review)

“Personal and Neighborhood Low-Cost Monitoring to Change Air Pollution Awareness, Perceptions, and Behaviors: A Case Study in Gabon, Africa” (with Sigride Vencesla Jenniska Asseko*, Alain Desouza, Medard Obiang Ebanega, Robert Vancesla Obiang Zogo, Sarah E. Rothenberg, Adam Branscum, Nordica MacCarty, Perry Hystad) (submitted)

“COVID-19 Vaccine Hesitancy & Information Sources Among Adults with Disabilities” (with Devan McClain*, Jacob Ditsch, and Charles Drum)