Hi!
I write models and design experiments to address questions in behavioral economics and applied game theory.I have also worked with field data from professional sports.
Contact
- julian.matthes [at] awi.uni-heidelberg.de
- AWI, Bergheimer Straße 58, Room 01.007.
Short CV
- Since 2021: PhD candidate in Economics at Heidelberg University (under supervision of J. Oechssler)
- Jan-Mar 2025: Visitor at University College London (at invitation of R. Spiegler)
- 2021 - 2023: Visiting PhD student at GESS, Mannheim University
- 2016 - 2021: BSc and MSc Mathematics at Heidelberg University
Advanced Work in Progress (ask me for a draft)
On the Demand for Mental Models (with Katharina Momsen)
- Online experiment conducted on Prolific.
- Do people treat interpretations of historic data as a substitute to more data (or an informative signal) when making predictions?
- Does anticipatory utility impact the tradeoff, i.e., do interpretations enable motivated reasoning?
Economic Decision Making during Moderate Physical Exercise (with Carlo Dindorf)
- Lab experiment currently conducted in Kaiserslautern.
- Does economic behavior change within individuals when exercising at moderate intensity versus at rest?
- Experiment includes tasks on belief updating, other-regarding preferences, risk preferences, and adherence to GARP.
Early Work in Progress
Searching to Make Sense
Optimal Appraisal: An Economic Theory of Emotions (with Clément Staner)
Publications
Don't Put All Your Legs in One Basket - Theory and Evidence on Coopetition in Road Cycling (with David Piazolo)
European Economic Review: Volume 170 (2024)
- Theoretical and empirical analysis: How do characteristics of riders in competing groups of cyclists impact cooperation within these groups?
- Main Takeaways: Having a teammate in a competing group creates free-riding opportunities (in both groups). Groups with asymmetric skill distribution tend to cooperate better.
- Applications in IO, e.g. coopetition of chain stores in ports or tourism destinations.
Finding Large Rainbow Trees in Colorings of 
The Electronic Journal of Combinatorics: Volume 30, Issue 4 (2023)
- Pure Mathematics (combinatorics).
- I prove that asymptotically, the bipartite graph with 2n vertices (see picture for n=5) can be partitioned into n copies of any tree with n edges.