How Structural Are Structural Parameters?
---- Acknowledgments ----
We thank the editors, Daron Acemoglu, Kenneth Rogoff, and Mike Woodford; our two discussants, Tim Cogley and Frank Schorfheide; Pau Rabanal, Garey Ramey, Stephanie Schmitt-Grohé, and Martín Uribe, and participants at the NBER Macroeconomics Annual conference for comments. Beyond the usual disclaimer, we must note that any views expressed herein are those of the authors and not necessarily those of the Federal Reserve Bank of Atlanta or the Federal Reserve System. Finally, we also thank the NSF for financial support. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.