This paper aims an empirical investigation of uncertainty in the Euro Zone as well as the US. For this purpose I conduct a factor analysis of uncertainty measures starting in 2001 until the end of 2011. I use survey-based data provided by the ECB and the Federal Reserve Bank of Philadelphia as...

Historical Origins of Uncertainty in Economic Theory -- Theoretical Foundations of Monetary Policy under Uncertainty -- Empirical Investigations of Market Uncertainty -- Communicated Uncertainty of the European Central Bank.