Campbell, Kayleigh B. and Candace Brakewood
"Sharing riders: How bikesharing impacts bus ridership in New York City."
Transportation Research Part A: Policy and Practice 100 (2017): 264-282. 

Working Papers 

"Accessibility and mobility in transportation planning: A Nairobi case study" 
with James RisingJacqueline M Klopp, and Jacinta Mwikali Mbilo

"Historical transit, density, and carbon dioxide emissions in U.S. cities"