Bastian Alm

Urban systems, and regions more generally, are the epicenters of many of today’s social issues. Yet they are also the global drivers of technological innovation, and thus it is critical that we understand their vulnerabilities and what makes them resilient to different types of shocks. We take regions to be systems composed of internal networks of interdependent components. As the connectedness of those networks increases, it allows information and resources to move more rapidly within a region. Yet, it also increases the speed and efficiency at which the effects of shocks cascade through the system. Here we analyzed regional networks of interdependent industries and how their structures relate to a region’s vulnerability to shocks. Methodologically, we utilized a metric of economic connectedness called tightness which quantifies a region’s internal connectedness relative to other regions. We calculated tightness for German regions during the Great Recession, comparing it to each region’s economic performance during the shock (2007–2009) and during recovery (2009–2011). We find that tightness is negatively correlated with changes in economic performance during the shock but positively during recovery. This suggests that regional economic planners face a tradeoff between being more productive or being more vulnerable to the next economic shock.

Seit 2011 weist Deutschland ununterbrochen den weltweit höchsten Leistungsbilanzüberschuss auf. Eine Reihe von Ökonomen und Politikern aus dem In- und Ausland sowie internationale Institutionen und Organisationen fordern die Bundesregierung deshalb seit einigen Jahren dazu auf, Gegenmaßnahmen zu ergreifen. Im Fokus stehen dabei regelmäßig Handlungsempfehlungen zur Stärkung der öffentlichen und privaten Investitionen sowie des Reallohnwachstums in Deutschland. Da die Leistungsbilanzungleichgewichte längst ein globales Phänomen sind, wird hier ein multilateraler handelspolitischer Ansatz diskutiert. Persistent and significant current account imbalances are often seen as one of the greatest threats to the global economy and a catalyst for protectionist tendencies. Germany is often criticised for running a high surplus. However, economists disagree about whether and to what extent the German current-account surplus is excessive and which policy measures could help to rebalance the current account. The authors argue that the German current-account surplus is a global phenomenon and hence requires in addition to economic policies that could stimulate investment activity in Germany an internationally coordinated approach. Taking into account the specific circumstances of a country, the WTO could act as an institutional framework to deal with global imbalances. In particular the WTO’s Trade Policy Review Mechanism could be further developed into a forum for coordinating members’ trade policy and for agreeing on reciprocal measures among members. The concrete design could be based on other established international mechanisms, such as the European Semester.