Research
Publications
Work in progress
- Road Pricing: Travel Behavior and Public
Support
with Cloe Garnache and Gøril L. Andreassen
Download
working paper
We conduct a large-scale randomized controlled trial to examine the effects of time- and
location-specific, distance-based road pricing on travel behavior and driving externalities.
Using financial incentives and a smartphone app that automatically tracks participants'
travel behavior across different modes, we find that road pricing reduces driving
externalities by 5.3%, implying a price elasticity of -0.07 to -0.15 for the external costs
of driving. Our findings suggest that drivers of battery-electric vehicles (BEVs) are much
less responsive to road pricing than drivers of non-BEVs. Furthermore, we find that
providing information on the expected benefits of road pricing enhances public support for
such policies, whereas experience with road pricing has little impact.
- The real cost of owning a car: Individual and city-wide benefits of
carsharing.
with Rebecca Thorne and Ingrid Sundvor and Grunde Wesenberg
Download working
paper
This study investigates the economic and environmental potential of carsharing as an
alternative to private vehicle ownership. Using data from a web-based calculator (N=2 965),
we estimate cost and emission savings based on vehicle characteristics and travel behaviour.
A cluster analysis reveals three user groups: those who consistently save money by switching
to carsharing, those with negligible savings, and those for whom carsharing is not
cost-effective. Largest savings are found among users who do not rely on private cars for
daily commuting, but instead use them occasionally for errands, weekend outings, or
vacations. Users in the “gain” cluster (more than 60%) can save on average 36 000 NOK
annually (EUR 3 000). Scaling these findings to Oslo’s vehicle fleet under a 15 % uptake
scenario suggests potential city-wide reductions of 7 % in CO₂ and 13 % in NOₓ emissions,
primarily due to the greater efficiency and higher EV share in the carsharing fleet. Policy
implications highlight the importance of targeting non-daily car users and supporting peak
demand periods through infrastructure and shared fleet integration.
- Game On: Promoting Active Transport Among
Adolescents
with Siv-Elisabeth Skjelbred
This paper examines whether behavioural techniques and gamification increases active travel ---
walking or cycling as a means of transport --- among adolescents. We conduct a randomized field
experiment with 163 upper secondary school students in southeastern Norway, who used a mobility
tracking app that recorded their walking and cycling activity. Despite incorporating behavioural
change techniques that have proven effective in other context, such as goal-setting, personalised
feedback and social comparison, the treatment produced no consistent effects on walking and cycling
activity. Subgroup analyses indicate weak effects among students with low baseline activity levels.
The study highlight the challenges of influencing habitual behaviours through light-touch
interventions.
- Public support for replacing road tolls with universal road
pricing: a stated choice experiments
with Alberto Antonioni, Cloe Garnache, Sara
Ghivarello, Askill H. Halse and Francesca Lipari
Economists have long argued that road traffic should be taxed based on the externalities it imposes.
Several countries are now considering moving towards universal road pricing, where all car drivers
pay a tax based on kilometers driven, which varies by time and place. While there is some evidence
on public opposition against road tolls, fuel taxes, and other environmental taxes, there is little
evidence on attitudes towards universal road pricing. In this paper, we show evidence from a stated
choice experiment among survey participants in Norway. Norway is interesting both because the high
share of electric vehicles means that many do not pay fuel taxes, but also because many drivers
already face road tolls on their daily trips and therefore might not pay more under road pricing.
The experiment shows that a substantial share of the respondents prefer universal road pricing over
current road tolls and fuel taxes, but that support depends on the price level and how revenues are
spent. Using latent class analysis and machine learning methods, we identify different groups of
respondents with quite distinct policy preferences.
- Public support for designing a universal road pricing.
Experimental insights from Madrid
with Alberto Antonioni, Sara
Ghivarello, Askill H. Halse and Francesca Lipari
Designing effective and publicly acceptable transport policies is crucial for promoting sustainable
mobility. This study investigates public attitudes toward universal road pricing using survey
experimental data from over 600 participants in the Madrid region. We find that higher price levels
significantly reduce support for road pricing, while electric vehicle discounts and allocating
revenues to public transport investments increase acceptability. Using latent class analysis adn
supervised machine learning algorithms, such as random forest and gradient boosting, we identify
four groups ranging from pro-policy to anti-policy individuals.
We also measure empirical and normative expectations, showing that perceived social norms diverge
from actual behavior. Rspondents systematically overestimate car use and what others consider
desirable.
This work contributes to the design of more acceptable and equitable transport policies in a context
shaped by behavioral, social, and economic factors. Our findings offer actionable insights for
policymakers aiming to align transport policies with citizen preferences, highlighting the potential
of norm-based interventions.
- Working from home during the Covid-19 pandemic in
Norway: impact on subjective mood and work performance
with Aslak Fyhri and Katrine Karlsen
This article presents the effects of working from home as a restrictive measure of the
Covid-19 pandemic. We collected data from about 2000 Norwegian workers through a 7-wave
survey covering the period of re-opening between May and September 2020. We provide a
picture of the workers’ situation in Norway adjusting to an early “new normal” and insights
into the subjective experience of working from home, overcoming shortcomings typical of
earlier literature. The majority of our sample report both travelling to work and working
from home during the observation period, due to changes in public reccomandation. Exploiting
such variation, we find that people who work from home, report a significantly higher mood
and work performance (0.17-0-16 points higher on a scale 1-7) compared to when they
travelled to work. We also find important factors and heterogeneity impacting the subjective
experience of working from home.
- Voluntary contributions to an alternating-offer
bargaining: hold-up problem in the lab
with Kjell Arne Brekke
A two-stage game is designed to study how the bargaining outcome is influenced by relation
specific contributions. With two parties investing in a joint project and sharing the profit
though bargaining, the investment would be sunk cost at the bargaining stage and hence not
affecting bargaining strength, creates a hold-up problem which leads to underinvestment.
There are however several reason why the bargaining outcome could dependent on
contributions: fairness consideration, reference points and loss aversion. In this paper we
argue that the bargaining outcome do depend on contribution, and sufficiently so to turn the
hold-up problem into an coordination game, in many cases.
We first estimate parameters in a model with reference points and loss aversion, and show
that full contribution could potentially be an equilibrium. We then revert to a linear model
where we also can include the cost of bargaining. We find not only that subject get a share
of the pie that increases in their share of the contribution, but also that disagreement and
hence negotiation cost is increasing in the inequality of contribution, consistent with
self-serving biases.
- Saliency of toll ring prices, a large scale experiment
with Gøril L. Andreassen, Karen Hauge and Askill H. Halse
- The effect of electricity price shocks for electric vehicle
demand in the new and used Norwegian market
with Cloe Garnache