This paper applies Benders decomposition to two-stage stochastic problems for energy planning with multiple climatic years, a key problem for the design of renewable energy systems. First, we implement Benders decomposition with existing enhancements suited for the characteristics of the problem, a simple continuous masterproblem and fewbut large sub-problems. Next, we develop a novel trust-region ...
In response to strong revenue and income losses that a large share of the self-employed faced during the COVID-19 pandemic, the German federal government introduced a €50bn emergency aid program. Based on real-time online-survey data comprising more than 20,000 observations, we analyze the impact of this program on the subjective survival probability. In particular, we investigate how the digitalization ...
GC 2022
GC 2023
Food banks are returning to the spotlight as their use increases due to the coronavirus pandemic and the influx of Ukrainian refugees to Germany. The current discussion is focused on whether the food banks can handle the increasing number of users as well as the financial and organizational challenges that come with them. Until now, however, no robust, empirical data on food bank use has been available. ...
Users have the possibility to participate in two upcoming SOEPcampus events. SOEPcampus@Lunch: From next month on we offer an online workshop series over lunchtime as introduction to the data of the SOEP study. Participants will be introduced to the content of the study, its data-structure, sample selection and weighting strategy and they will be provided with an overview on the study documentation.To ...
We would like to draw your attention to a special issue on „Regional Development Dynamics and Their Social, Economic and Political Consequences“ that Prof. Dr. Stefan Liebig and Prof. Dr. Simon Kühne are editing in the Social Sciences journal.We’re inviting contributions focusing on (but not limited to) one or more of the following themes: Theoretical or empirical reflections ...
We investigate the impact of demographic changes on local public services taking the case of water service. We apply a structural production function approach to a large panel of German water utilities between 2003 and 2014. Exploring variation of population density and the population age structure across service areas and over time, we provide evidence that demographics and their changes significantly ...
How does previous exposure to massive immigrant inflows affect concerns about current immigration and the integration of refugees? To answer this question, we investigate attitudes toward newcomers among natives and previous immigrants. In areas that in the 1990s received higher inflows of immigrants of German origin—so-called ethnic Germans—native Germans are more likely to believe that refugees are ...
High growth firms are high on the policy agenda as empirical evidence consistently shows that they disproportionately contribute to economic growth via net job creation. Several innovation scholars analyze how high growth entrepreneurship responds to the local enabling environment, such as institutional and framework conditions. However, the majority of these studies look at the role of formal...
