"Aid and Exodus: U.S. Military Assistance and Refugee Flows to the United States" (with Eugen Dimant, Daniel Meierrieks and Laura Renner), 2025.
"Foreshadowing Mars: Religiosity and Conflict in Pre-Enlightenment Europe" (with Luke Barber and Michael Jetter), this version: March 2025. A short summary of the paper's main idea and contributions is available as a video on Youtube.
"Can Moral Reminders Curb Corruption? Evidence from an Online Classroom Experiment" (with Corinna Claus and Ekkehard Köhler), 2022.
"Polygyny, Inequality, and Social Unrest" (with Laura Renner), 2020.
(Preliminary versions available upon request.)
"Examining Water, Energy, and Food Security in Sub-Saharan Africa: Opportunities and Challenges of Agrivoltaics" (with Jessica Berneiser, Nora Adelhardt and Medha), 2025.
"Freiheit und Eigenverantwortung im geopolitischen und geoökonomischen Stresstest", 2025.
"How to Address the Deficit-Populism Double Bind? A Contemporary Ordoliberal Perspective" (with Malte Dold), 2025.
"Domestic Capitalism and International Peace" (with Jerg Gutmann), 2024.
"Rules, Uncertainty, and Ordoliberalism: The Case of Climate Change" (with Malte Dold), 2024.
"Agrivoltaics across the Water-Energy-Food-Nexus in Africa: Opportunities and Challenges for Rural Communities in Mali" (with Ambe Emmanuel Cheo, Nora Adelhardt and 12 others), 2022.
"The Roots of Islamist Armed Struggle, 1968-2007" (with Daniel Meierrieks), VfS Conference Paper, 2014.
"Looking Back on Anger: Explaining the Social Origins of Left-Wing and Nationalist-Separatist Terrorism in Western Europe, 1970-2007" (with Sarah Brockhoff and Daniel Meierrieks), CESifo Working Paper No. 3789, 2012.
Some of the ideas of this paper have been published in "Heterogeneous Terrorism: Determinants of Left-Wing and Nationalist-Separatist Terrorism in Western Europe" (with Sarah Brockhoff and Daniel Meierrieks), Peace Economics, Peace Science and Public Policy 22(4), 393-401, 2016.
"Does Income Inequality Lead to Terrorism?" (with Daniel Meierrieks), two versions on SSRN, 2010/2016.
This working paper is very popular, probably because of its title; however, the versions of the paper with this title are outdated and much less sophisticated than the paper eventually published in World Development (2019). It is titled "Income inequality, redistribution and domestic terrorism". Please read and cite only this version of the paper!!!
"Back to Bismarck? Shifting Preferences for Intragenerational Redistribution in OECD Pension Systems" (with Stefan Traub), LIS Working No. 485, 2008.
The original idea of this paper survived in the much more sophicated paper "Inequality, Life Expectancy, and the Alienation Effect: Insights from a Real-Effort Experiment on the Intragenerational Redistribution Puzzle" (with Christine Meemann and Stefan Traub) published in the Journal of Economic Behavior & Organization 237, 107149, 2025.