Portrait of Jakob Schmidhäuser

PhD Candidate in Economics

Jakob Schmidhäuser

University of Mannheim · ZEW Mannheim · University of Freiburg

I am an Economics PhD candidate at the Center for Doctoral Studies in Economics (CDSE) at University of Mannheim and a researcher at ZEW (Leibniz Center for European Economic Research). My supervisors are Eckhard Janeba and Sebastian Siegloch. I recently joined the chair of Kristina Strohmaier at the University of Freiburg.

Applied Economics Public Economics Labor Economics Economics of Science

Working Papers

Foreign Troops, Local Economies: The Economic Effects of US Withdrawals from Germany (JMP)
with Johannes Kochems
This paper analyzes the local economic impacts of troop deployments. We exploit variation from the historic large-scale US troop withdrawal from Germany triggered by the end of the Cold War, to estimate the effect on local labor markets and public finances. We use administrative data provided by the US Department of Defense to quantify the size of the troop withdrawal at the municipal level. Using a synthetic difference-in-differences estimator, we find negative effects on local labor markets: for each withdrawn US soldier, the number of local jobs decreases by 0.53. The decrease in economic activity results in a reduction of revenues which municipalities balance by lowering their expenditures, while increasing business and property tax multipliers. In individual-level analyses, we document that workers displaced by the closure of a US military base have persistently lower employment rates. Moreover, their daily wages remain around 9.2 percent lower fifteen years after the layoff. The negative impact on labor outcomes is particularly pronounced for women, older workers, and those employed in regions with more unfavorable initial labor market conditions.

Media Germany: Handelsblatt (1), (2), (3), DIE ZEIT, Süddeutsche Zeitung, DER SPIEGEL, Frankfurter Allgemeine, DIE WELT, Focus, Stern, ntv, Staatsanzeiger BW
Media International: Bloomberg, The Telegraph, IlSole24Ore
Podcast: ZEW Wirklich Wirtschaft: Spotify, Apple Podcasts

Inequality as a Constraint on (Repugnant) Markets
with Paul Hild
Draft
Willingness to prevent a transaction by vignette, comparing equality-high, equality-low and inequality treatments When third parties oppose repugnant transactions, legal bans often prevent welfare-improving trades. We provide the first causal evidence that financial inequality between transacting parties drives such opposition. In a pre-registered vignette experiment (N = 1,073), we alter the income levels of buyer and seller across five vignettes describing repugnant transactions. We test the effect in two independent samples (a U.S. sample and a sample drawn from selected European countries) and find that inequality increases willingness to prevent transactions by 21%. The effect goes beyond the effect of low income: opposition rises substantially more when a low-income seller faces a richer buyer than when both parties have equally low incomes. Inequality also affects repugnance norms, suggesting it strengthens the collectively enforced character of repugnance. Moreover, we show that the same market can be contested for opposing reasons depending on the relational context: under equal incomes, high prices increase opposition (coercion); under inequality, low prices increase opposition (exploitation). Our findings suggest that market design addressing socioeconomic asymmetry between parties may reduce resistance to repugnant markets.

Work in Progress

Surviving Mass Layoffs
with Efi Adamopoulou and Alexandre Gnaedinger
Statistical Significance
with Abel Brodeur and Michaela Slotwinski
Foreign Troops, Local Politics: The Political Effects of US Withdrawals from Germany
with Johannes Kochems

Policy Consulting

Retirement Planning Using the Digital Pension Overview – An Empirical Evaluation
with Tabea Bucher-Koenen, Mathias Dolls, Holger Stichnoth and Silke Übelmesser · ongoing
Micro-simulating VAT and Energy Taxes in ZEW-EviSTA Using the EVS
with Michael Hebsaker and Holger Stichnoth · ongoing
Horizon Europe, WeLaR: New Forms of Work and Workers’ Demand for Security and Stability
with Zuzanna Kowalik, Piotr Lewandowski, Fabrizio Pompei, Wojciech Szymczak and Laurène Thil · 2025
Scientific Analyses of Bavarian Family Policies
with Florian Buhlmann, Michael Hebsaker, Tobias Kreuz, Lukas Riedel and Holger Stichnoth · 2022

Media: Süddeutsche Zeitung · Press releases: Green Party, ZEW

ZEW-EviSTA: A Microsimulation Model of the German Tax and Transfer System
with Florian Buhlmann, Michael Hebsaker, Tobias Kreuz, Sebastian Siegloch and Holger Stichnoth · 2022
This article describes ZEW-EviSTA, the microsimulation model developed and used at ZEW - Centre for European Economic Research in Mannheim. The model simulates the German tax and transfer system using household micro level data. By estimating fiscal effects, labor market outcomes as well as distributional impacts the model allows for a comprehensive ex ante analysis of reform proposals. Heterogeneity analyses targeting specific subgroups of the population are feasible, too. The present article describes which data sources are used for the simulation, how key features of the German tax and transfer system are implemented, which simulation methods are employed to analyze policy changes and how the model is validated against official statistics. Moreover, by providing examples of the outputs which ZEW-EviSTA generates the paper gives an idea of the questions that can be answered using the model.