@misc{Billi2005, author = {Roberto Billi}, title = {The optimal inflation buffer with a zero bound on nominal interest rates}, booktitle = {Center for Financial Studies (Frankfurt am Main): CFS working paper series ; No. 2005,17}, number = {November 25, 2004}, institution = {Center for Financial Studies (CFS)}, series = {CFS working paper series}, number = {2005, 17}, type = {workingpaper}, year = {2005}, }