We analyze the effects of retail investor sentiment on the German stock market by introducing four distinct investor pessimism indices (IPIs) based on selected aggregate Google search queries of households. We assess the impact of weekly changes in sentiment captured by the IPIs on both...

The auctioning of frequency has to comply with a multitude of requirements in order to guarantee a transparent and efficient process. The German Federal Network Agency (Bundesnetzagentur) has opted for a design that provides participants with information on the highest bid after each round for...

Assessing the infection fatality rate (IFR) of SARS-CoV-2 is one of the most controversial issues during the pandemic. Due to asymptomatic or mild courses of COVID-19, many infections remain undetected. Reported case fatality rates - COVID-19-associated deaths divided by number of detected...

The auctioning of frequency has to comply with a multitude of requirements in order to guarantee a transparent and efficient process. The German Federal Network Agency (Bundesnetzagentur) has opted for a design that provides participants with information on the highest bid after each round for...

This case study describes Porsche's attempt to acquire Volkswagen. It covers the timeline of events and major press releases, the history of the two companies, their operating and financial performances and ownership structures. The case also illustrates the role of the state as a shareholder,...