Eine aufgabenorientierte Vorbereitung ist für das Bestehen vieler Prüfungen im Bereich der Wirtschaftswissenschaften unerlässlich. Der Aufbau der Kapitel orientiert sich an der grundlegend aktualisierten 7. Auflage des Lehrbuches Makroökonomie (ISBN 9783868943085) von...

Credit rating agencies (CRAs) very often have been criticized for announcing inaccurate credit ratings and are suspected of being exposed to conflicts of interest. Despite these objections CRAs remained largely unregulated. Based on Pagano & Immordino (2007), we study the optimal regulation of...

This paper provides a framework to analyse emergency liquidity assistance of central banks on financial markets in response to aggregate and idiosyncratic liquidity shocks. The model combines the microeconomic view of liquidity as the ability to sell assets quickly and at low costs and the...

Discretionary monetary policy produces a dynamic loss in the New Keynesian model in the presence of cost-push shocks. The possibility to commit to a specific policy rule can increase welfare. A number of authors since Woodford (1999) have argued in favour of a timeless perspective rule as an...

When back-testing the calibration quality of rating systems two-sided statistical tests can detect over- and under-estimation of credit risk. Some users though, such as risk-averse investors and regulators, are primarily interested in the under-estimation of risk only, and thus require one-sided...

This paper presents a proposal for a regulatory regime aimed at reducing systemic risk effectively and internationally. Systemic relevance should be internalized with a levy (or "tax"), the level of which (or "tax rate") rises with the systemic relevance of an institution (Pigouvian taxation)....

In 2000 and 2001, several European countries carried out auctions for third generation technologies or universal mobile telephone services (UMTS) communication licenses. These "spectrum auctions" inaugurated yet another era in an industry that has already been transformed by a combination of...