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Quantitative Trade with Ships

This paper highlights an underexplored margin of heterogeneity that shapes resilience to disruptions in global shipping - the differential reliance of countries and sectors on specific categories of vessels. We combine US bills of lading records with ship registry and AIS-based port call data to document new stylized facts on vessel deployment, including switching patterns across ships, country specialization ...

Defending autonomy: Which industrial strategy for European technology leadership in defence and deterrence

With shifting geopolitical tectonics Europe is in urgent need to build autonomy in defence and deterrence. As military spending is increasing significantly, Germany and Europe need an industrial strategy that helps the continent build a stronger and more independent role in developing modern defence and dual use technologies, foster competition and innovation and expand European defence production...

The Effects of Government Interventions on Housing Market: A Meta-Study of Empirical Literature

Housing markets are affected by a wide variety of factors. Among them, governmental regulations play an important role. Besides desired effects, all these policies exert a number of side effects, even offsetting the desired effects. In addition, different policies can cancel out each other. Therefore, it is important to be aware of the effects of individual policies and the composite effects resulting ...

SOEP-Core – 2025: Report of Survey Methodology and Fieldwork

District Heating in the Heat Transition: Investment, Regulation and Energy Prices (FIRE)

The bridge project ‘District Heating in the Heat Transition: Investment, Regulation and Energy Prices (FIRE)’, run by the Climate Policy and Energy, Transport and Environment departments, examines the compatibility of district heating's pricing structure with its key role in the heat transition. The aim of the research project is to gain a better understanding of the effect of decarbonization and...

Photovoltaic Manufacturing in the EU Requires a Unified Industrial Strategy

The Financial Risks of Delays in Nuclear Waste Disposal: A Stochastic Analysis of Germany’s Waste Fund KENFO

Germany is tasked with ensuring the safe and final storage of high-level radioactive waste in a deep geological repository. Since 2022, the ambitious target year of 2031 to identify a suitable location for such a site has been deferred by most public actors. The target year was pushed back by several decades to 2046 or even 2068, consequently delaying the completion of all waste management activities ...

How many people are living in a forced marriage in Germany? A Network Scale-Up approach to estimate hidden human rights abuse

Forced marriage is a critical human rights violation. Challenges associated with estimating its prevalence hamper informed policy making and effective allocation of resources for victim support. This study employs a high-quality online access panel and the Network Scale-Up Method (NSUM) to estimate the prevalence of forced marriages in Germany. Using aggregated relational data and Bayesian models,...

Indirect vs. direct media effects: Local media coverage and migration concerns

Attitudes toward immigration rank among the most politically consequential issues in contemporary Western democracies, yet the mechanisms through which media coverage shapes those attitudes remain incompletely understood. Existing research has documented a robust association between migration-related news coverage and people’s opinions, but by relying on aggregate national press data without...

DIW Women Executives Barometer: Method Report and Codebook for the Waves 2015-2026

In the annual DIW Women Executives Barometer, we document the share of women on the executive and supervisory boards of the largest companies in Germany. We separately analyse different groups of companies, among which there are the 200 companies with the highest turnover in Germany outside the financial sector (top 200 companies), all companies listed in the German stock index DAX (DAX companies) ...