Thanks for reply,would you please help again.
Yesterday ,I saw this paper
http://www.price.e.u-tokyo.ac.jp/img/researchdata/pdf/p_wp018.pdf,it seems that the author got the credible intervals for the impulse response functions.It says that "In each panel, the solid thick line represents the true response, and the solid thin line and dashed lines are respectively the posterior mean and 90 percent credible interval for the estimated response."Please see page 11.
As a beginner,I can't figure this out.would you please spare a little more time?
Thank you for your time.
best regards,
tiantian.