Document de travail

Identifying News Shocks from SVARs

Patrick Fève et Ahmat Jidoud


This paper investigates the reliability of SVARs to identify the dynamic effects of news shocks. We show analytically that the dynamics implied by SVARs, using both long–run and short–run restrictions, are biased. However, the bias vanishes as long as news shocks account for most of the variability of the endogenous variable and the economy exhibits strong forward–looking behavior. Our simulation experiments confirm these findings and further suggest that the number of lags is a key ingredient for the success of the VAR setup. Furthermore, a simple correlation diagnostic test shows that news shocks identified using both restrictions are found to exhibit a correlation close to unity, provided that news shocks drive an overwhelming part of aggregate fluctuations.


News shocks; SVARs; Identification; Diagnostic Test; Non–fundamentalness;

Codes JEL

  • C32: Time-Series Models • Dynamic Quantile Regressions • Dynamic Treatment Effect Models • Diffusion Processes
  • C52: Model Evaluation, Validation, and Selection
  • E32: Business Fluctuations • Cycles

Remplacé par

Patrick Fève et Ahmat Jidoud, « Identifying News Shocks from SVARs », Journal of Macroeconomics, vol. 34, n° 4, décembre 2012, p. 909–932.


Patrick Fève et Ahmat Jidoud, « Identifying News Shocks from SVARs », TSE Working Paper, n° 12-287, mars 2012.

Voir aussi

Publié dans

TSE Working Paper, n° 12-287, mars 2012