Recreation and Transportation Choice
Paper Session
Sunday, Jan. 7, 2024 8:00 AM - 10:00 AM (CST)
- Chair: Todd Gerarden, Cornell University
Displacing Congestion: Evidence from Paris
Abstract
This paper shows that road-closing policies may have adverse short-run effects on pollution by reallocating traffic toward more congested roads. I study the impact of the 2016 closure of the Voie Georges Pompidou, a one-way expressway crossing downtown Paris, on traffic and pollution displacement. To do so, I rely on a difference-in-difference strategy based on the direction and the timing of traffic, which I implement on detailed road-sensor data. I show that the closure lowered average speed by over 15% on two sets of substitute roads: central streets nearby and the already congested southern ring road. Using air quality data, I show that NO2 emissions increased by 6% near the ring road and by 1.5% near local roads. The reduced-form results on traffic are quantitatively consistent with a calibrated model of shortest route choice, which allows me to recover the underlying rerouting patterns. Even though few displaced commuters diverted to the ring road, they triggered a massive pollution increase because of the U-shaped relationship between emissions and traffic speed. Overall, I estimate that up to 90% of the pollution cost was borne by lower-income residents around the ring road, who lived far away from the new amenity created by the closure and mostly outside the jurisdiction responsible for the closure decision. Finally, I study counterfactual closure scenarios to assess under which conditions those adverse effects could have been mitigated.Show Me the Money! Incentives versus Nudges to Shift Electric Vehicle Charging
Abstract
The electrification of the transportation sector is the anticipated pathway toward its decarbonization. The market share of electric vehicles (EVs) is already expanding rapidly. However, the impact of this growth on electric grids will largely depend on when EVs are charged. Current electric distribution systems are not prepared for a full conversion to EVs; coincident charging among consumers can lead to distribution grid failure. If consumer EV charging can be coordinated, however, costly grid upgrades can be avoided. Using a field experiment, we test the effectiveness of financial incentives vs moral suasion “nudges” to shift charging to off-peak hours. The nudge group receives information highlighting the system benefits of charging in off-peak hours (10pm - 6am in our experiment) without any financial rewards. The financial group receives the same information but is also rewarded with 3.5 cents per kilowatt-hour (kWh) for all charging during off-peak hours. (The baseline electricity rate is about 10-20 cents per kWh during the treatment period). Using a differences-in-differences estimation strategy, we find no effect from the nudge treatment. The financially incentivized group, however, shifts their share of off-peak charging from roughly 50% to over 70%. We assess the potential for consumers to form charging habits from financial incentives by randomizing half of the financial group to stop receiving payments. Removing the incentives results in behavior quickly reverting to pre-intervention behavior. These findings emphasize the importance of well-designed tariffs that financially reward behavior that aligns with the time-varying marginal cost of electricity systems.Attribute Production and Technical Change in Automobiles: Implications for Greenhouse Gas Emissions Standards
Abstract
We study how innovation, preferences, and policy interact to shape car attributes using theory and US purchase data for 1995--2017. We find that drivetrain costs fell by 1.5% per year, with technologies first adopted among buyers of attribute-rich cars. Innovation was biased in favor of fuel economy, reinforced by rising gas prices. Yet size and acceleration both increased, which we attribute to surging demand for these attributes. We show that gas taxes and efficiency standards induce innovation that reduces the cost of adding fuel-saving technology, such that size and acceleration become less sensitive to further changes in policy.Discussant(s)
John Whitehead
,
Appalachian State University
Sarah Johnston
,
University of Wisconsin-Madison
Sara Avila
,
University of Colorado-Boulder
James Archsmith
,
University of Maryland
JEL Classifications
- R4 - Transportation Economics
- Q5 - Environmental Economics