Within the BERG Working Paper series the following Working Paper has been republished: 

Christian R. Proaño and Benjamin Lojak: "Debt Stabilization and Macroeconomic Volatility in Monetary Unions under Heterogeneous Sovereign Risk Perceptions". BERG Working Paper 106, University of Bamberg, Germany.

Furthermore, a revised version of the Federal Bank Discussion Paper 21/2015 has been published as: Lena Dräger and Christian R. Proaño: "Cross-Border Banking and Business Cycles in Asymmetric Currency Unions", BERG Working Paper 105, University of Bamberg.

Here you can find the working papers.