Overview publications

The Covid-19 pandemic has had a profound impact on the global economy, leaving us with a significant stock of additional debt. A widespread view is that the burden of servicing this debt should be distributed fairly, suggesting that tax systems should become more progressive. How should the optimal degree of income tax progression change if governments need to raise more revenues? In this article, the authors use the workhorse model of optimal income taxation to analyze the change in the degree of tax progressivity in response to the fiscal pressure caused by the Covid-19 pandemic.

What makes a good teacher? This is one of the central questions in the economics of education. General teacher qualifications, such as education level or advanced degrees, tend to be poor predictors of teacher quality. Instead, some studies have shown that subject-specific qualifications predict teacher quality better. However, the vast majority of such studies are based on data from the United States. It is therefore unclear to what extent the findings can be generalized to other nations, as teacher education programs vary widely across countries. The lack of international evidence is particularly problematic for developing economies, which would arguably benefit most from improving student achievement.

War is raging close to NATO's Eastern border. Russia has attacked Ukraine and threatens those states that in the past had been part of Moscow's sphere of influence. Many of them are now member states of NATO. As a collective defense alliance, this poses a threat to all NATO members. Since the ability to defend against an aggressor does not come for free, defense spending will be on the agenda at the NATO Summit in Vilnius in July 2023. NATO Secretary General Jens Stoltenberg has already expressed his expectation that all member states no longer see the 2% target as a mere ambition, but as the floor for their future defense spending. This paper presents first results for the expected defense spending of the 30 NATO members and the candidate country Sweden in 2023.

The new Policy Report analyses the role of social policies in different European welfare states regarding minimum income protection and active inclusion. It finds consistent differences in terms of crisis resilience across countries and welfare state types. In general, Nordic and Continental European welfare states with strong upstream systems and minimum income support (MIS) show better outcomes in core socio-economic outcomes such as poverty and exclusion risks. However, labour market integration shows some dualisms in Continental Europe. The study shows that MIS holds particular importance if there are gaps in upstream systems or cases of severe and lasting crises.

The war in Ukraine is not over yet. Nevertheless, a possible roadmap and proposals for post-war reconstruction strategies are currently being discussed. They should be accompanied by economic and political reforms in the country. To finance this project, Ukraine will need to tap a variety of sources and institutions. This is because it will require investments in the hundreds of billions ‒ perhaps even trillions ‒ of US dollars. The EU, the US and other Western countries have signaled their willingness to provide further financial support for postwar reconstruction. Also potentially involved could be bilateral donors, multilateral banks, private investors, and the Russian state with reparations.

The analysis shows that data skills are required in many job advertisements in Germany and are becoming more relevant. This is a positive sign for the data economy in Germany, as companies increasingly realize the potential of data and try to implement it in their own operations. However, a growing demand for employees with data skills poses challenges for companies in the future in view of the existing skills gap, especially in digitalization professions. Policymakers should intervene by, for example, taking measures that make it easier for companies to recruit foreign workers.

The recent literature on law enforcement activities and police presence shows that the intensity of crime can be influenced by police availability and visibility. This study is one of the first to analyze the effects of police infrastructure on crime occurrence. Attempts to cut back on police infrastructures in the area in favor of supposed efficiency gains can therefore be accompanied by considerable side effects – in the form of an increase in reported property crimes. Thus, the present results can inform policymakers and practitioners about possible unintended side effects of efficiency-oriented restructuring of administrative infrastructures. These should be considered for future plans of an efficient and future-proof reorganization of police structures.

In this article, the authors provide new evidence on regional income inequality in Germany, using tabulated income tax statistics for the period 1998-2016. Other than related work on regional income inequality in Germany which analyzes income or wages at the county level, we can characterize inequality at the municipality level. As there currently exist 401 counties in Germany, but more than 10,000 municipalities, our analysis is conducted at a much more fine-grained level.

Excess profit taxes (EPTs) emerge as an option to contribute to the extra needed revenues, avoiding a general increase in corporate tax rates, while having the prospect to serve as a gateway to converge toward a permanent efficient rent tax instaed of the corporate income tax. General unilateral (temporary or permanent) EPTs would face the same international pressures from profit shifting and tax competition as the existing corporate income tax, calling for international coordination. A coordinated EPT on multinational enterprises can take the form of a formulary apportionment approach that allocates the EPT base using sales by destination.

On 1 January 2023, Croatia became the newest member of the Schengen Agreement of the European Union (EU) and also joined the Eurozone. This will not only mean a new currency and the elimination of border controls. It will also mean reductions in barriers to trade between Croatia and other EU member states. The Schengen Agreement and the Eurozone are part of the engine of European integration, namely the reduction of trading costs between the member countries in various dimensions as well as in trade with third countries. This includes the European Customs Union, the European Single Market, the Eurozone, the removal of customs barriers in the Schengen area and the EU’s free trade agreements with third countries.