NBER Working Paper No. 16654
---- Acknowledgements ----
Prepared for Friedman, Benjamin M., and Michael Woodford, eds., Handbook of Monetary Economics, Volume 3a and 3b, forthcoming. I am grateful for comments by Petra Gerlach-Kristen, Amund Holmsen, Magnus Jonsson, Stefan Laséen, Edward Nelson, Athanasios Orphanides, Ulf Söderström, Anders Vredin, Michael Woodford, and participants in the ECB conference "Key Developments in Monetary Economics" and in a seminar at the Riksbank. I thank Carl Andreas Claussen for excellent research assistance. The views presented here are my own and not necessarily those of other members of the Riksbank's executive board or staff. The views expressed herein are those of the author and do not necessarily reflect the views of the National Bureau of Economic Research.