Research Area

Transportation Economics

Congestion, freight transportation, traffic externalities, mode substitution, safety, and the design of transportation policy.

Featured

The Role of Modal Substitution in Rebound Effects Within US Freight Transportation

With James Bushnell. Nature Energy, 9, pp. 1153-1160, September 2024.

This paper studies how substitution across freight modes affects rebound effects, connecting transportation behavior, energy use, and policy evaluation.

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Decline in Traffic Congestion Increased Accident Severity in the Wake of COVID-19

With Daniel Kaffine and Leah Kaffine. Transportation Research Record, 2677(4), April 2023.

The paper examines how changes in congestion during COVID-19 affected traffic accident severity and safety outcomes.

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When Should Carpools in HOV Lanes be Encouraged?

With Daniel Kaffine. Economic Inquiry, 57(1), January 2019.

This research studies HOV lane policy, carpool incentives, and the conditions under which encouraging carpools improves transportation outcomes.

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Unintended Consequences of Transportation Carbon Policies

With Stephen Holland, Christopher Knittel and Nathan Parker. Energy Journal, 36(3), July 2015.

The paper studies how transportation carbon policies can create unintended behavioral and environmental responses.

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Carpooling and Driver Responses to Fuel Price Changes: Evidence from Traffic Flows in Los Angeles

With Antonio Bento and Daniel Kaffine. Journal of Urban Economics, 77, September 2013.

This paper uses traffic-flow evidence from Los Angeles to study how drivers respond to fuel price changes through carpooling and travel behavior.

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Evidence of a Shift in the Short-Run Price Elasticity of Gasoline Demand

With Christopher Knittel and Daniel Sperling. Energy Journal, 29(1), January 2008.

This paper compares gasoline demand during high-price periods in the 1970s and 2000s, finding evidence that short-run gasoline demand became substantially more price inelastic.

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