I completed my PhD in Economics at the Max Planck Institute for Tax Law and Public Finance and the Ludwig Maximilian University of Munich. I mainly worked on game theory but also analysed data on bargaining and simulated protest propagation in social networks.

I received my Master's degree from Stockholm University, where I analysed time series and modelled income inequality and technological change.

Work in Progress

Proximity-based, Model-agnostic Effect Interpretation
I'm developing a way to interpret the estimated effect of a variable in any (blackbox) model.

Publications

Conflict between Non-exclusive Groups
How do conflicts in society play out when people are members of more than one group (e.g. poor and urban)? To answer this question, I develop a new theoretical model.
Send, J. (2020). Conflict between non-exclusive groups. Journal of Economic Behavior & Organization, 177, 858-874.

An Empirical Analysis of Insistent Bargaining (with Marco Serena)
We analyse 25M bargaining interactions on eBay and show that insistence appears to be sticky, exploitative, and vengeful.
Send, J., & Serena, M. (2022). An empirical analysis of insistent bargaining. Journal of Economic Psychology, 90, 102516.

Contest Copycats: Adversarial Duplication of Effort in Contests
I introduce a contest model in which players can spy on opponents and copy their effort. Protecting more productive players may hurt their winning chances.
Send, J. (2023). Contest Copycats: Adversarial Duplication of Effort in Contests. Defence and Peace Economics, 1-20.

Master's Thesis

Income Inequality, Unemployment and Technological Change (2017)
I combine labour markets with frictions and an aggregate production function including “computer capital” that is a substitute for low-skill and a complement for high-skill workers. This allows me to explain different developments in unemployment and income inequality in developed countries.
Supervisor: Ann-Sofie Kolm