Benkwitz, Alexander Lütkepohl, Helmut Neumann, Michael H.
Year of Publication:
SFB 373 Discussion Paper 1997,85
Bootstrap confidence intervals for impulse responses computed from autoregressive processes are considered. A detailed analysis of the methods in current use shows that they are not very reliable in some cases. In particular, there are theoretical reasons for them to have actual coverage probabilities which deviate considerably from the nominal level in some situations of practical importance. For a simple case alternative bootstrap methods are proposed which provide correct results asymptotically.