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How to Advance Theory with Structural VARs: Use the Sims-Cogley-Nason Approach

  • Patrick J. Kehoe

The common approach to evaluating a model in the structural VAR literature is to compare the impulse responses from structural VARs run on the data to the theoretical impulse responses from the model. The Sims-Cogley-Nason approach instead compares the structural VARs run on the data to identical structural VARs run on data from the model of the same length as the actual data. Chari, Kehoe, and McGrattan (2006) argue that the inappropriate comparison made by the common approach is the root of the problems in the SVAR literature. In practice, the problems can be solved simply. Switching from the common approach to the Sims-Cogley-Nason approach basically involves changing a few lines of computer code and a few lines of text. This switch will vastly increase the value of the structural VAR literature for economic theory.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 12575.

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Date of creation: Oct 2006
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Publication status: published as Assessing Structural VARs , Lawrence J. Christiano, Martin Eichenbaum, Robert Vigfusson. in NBER Macroeconomics Annual 2006, Volume 21 , Acemoglu, Rogoff, and Woodford. 2007
Handle: RePEc:nbr:nberwo:12575
Note: IFM ME EFG
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