The main challenge in high-skilled immigration is to make Europe sufficiently attractive. Employers should be trusted to evaluate who is qualified to work in non-regulated professions. Migration Partnerships ease low-skilled labor migration and help combat irregular migration. Distributing...

Worldwide, many people aspire to migrate to the EU for various motives, including persecution at home and better economic prospects in the EU - hence the notion of "mixed" migration. Without restrictions, far more people would migrate to the EU than the EU can or will accommodate. This is true...

Migration can stimulate economic growth when managed strategically. Heterogeneous impacts require targeted and redistributive policies. Narratives of migration as purely a supply-side issue are overly reductive. Migration can serve as a deficit-financing alternative to tax hikes or spending...

Refugee protection in Europe is characterized by free-riding and a highly inequitable distribution of responsibilities across EU member states. Refugee protection as a public good suffers from collective action challenges that have contributed to the under-provision of refugee protection...

Migration poses both an opportunity and a challenge for the EU, as it offers a solution to labor shortages and demographic imbalances, but also creates social and economic pressure. A fairer distribution of refugees among EU member states, considering age and education level, can optimize labor...

Ukrainian refugees in Poland have a high employment rate (55-65 percent), but most work in low-skilled jobs, with around 40 percent feeling overskilled compared to their qualifications. Refugees face a marked increase in routine task intensity (RTI) in Poland, performing more repetitive, less...

War of attrition. President Trump's promises of a quick end to the war are unlikely to come true. German and European policy must shift from providing temporary protection to supporting a productive return to support the Ukrainian economy. At present many Ukrainian refugees still require...

Tax administrations increasingly use audits via mail (correspondence audits) to audit taxpayers. Correspondence audits are cheaper than face-to-face audits but their effects on compliance are unclear. We investigate the effects of correspondence and face-to-face audits on post-audit tax...

The 9-Euro Ticket increased public transport use but hardly shifted away from car travel. Train use surged for leisure activities; car use dropped least among commuters. The 9-Euro Ticket led to overcrowding, delaying both regional and non-covered long-distance trains. A rough calculation...