Using the new unit root test by Phillips et al. (2011) we show that the Target balances of the German Bundesbank have been exploding from the beginning of 2009 to the beginning of 2013. By implementing a full-allotment policy and reducing the required minimum quality of collaterals in October...

We show, in this study, that the U.S. public debt–GDP ratio was explosive in nature during the 1791–2009 sample period. The huge increase in U.S. debt during World War II is responsible for this result. Our findings differ profoundly from those generated by the standard unit root tests,...