Im Gefolge der Finanzkrise werden Forderungen nach einer Reform oder sogar einer zeitlichen Aussetzung von Basel II laut. Kritisiert wird vor allem die systemimmanente Prozyklizität. Ist dieser Mechanismus mitverantwortlich für die bestehende oder vermeintliche Kreditklemme? Martin Hellwig...

We develop a model of rational bubbles based on the assumptions of unknown market liquidity and limited liability of traders. In a bubble, the price of an asset rises dynamically above its steady-state value, justified by rational expectations about future price developments. The larger the...

The severity and depth of the recent financial crisis hit many by surprise. Despite warning signs, the financial system seems to have been unable to aggregate existing information. As the events of Fall 2008 showed, many investors were caught off guard by the large number of banks collapsing...