IDEAS home Printed from
MyIDEAS: Login to save this software component or follow this series

NEWSIMPACT: Stata module to compute news impact curve for ARCH models

  • Sune Karlsson


    (Örebro University, Sweden)

newsimpact is for use after arch. It plots the news impact curve, the response in the conditional variance, sigma^2(t), to an innovation in the standardized error term, z(t-1). When calculating the response in sigma^2(t) historical conditional variances (sigma^2(t-i), i > 0) are set to sigma^2 and historical error terms (z(t-i), i > 1) are set to 1. The default value for sigma^2 is an estimate of the unconditional variance, the mean of the estimated conditional variances. Finally error terms that enter in the conditional variance formula are obtained as e(t) = sigma*z(t).

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.

File URL:
File Function: program code
Download Restriction: no

File URL:
File Function: help file
Download Restriction: no

Software component provided by Boston College Department of Economics in its series Statistical Software Components with number S456925.

in new window

Programming language: Stata
Requires: Stata version 9
Date of creation: 07 Apr 2008
Date of revision:
Handle: RePEc:boc:bocode:s456925
Note: This module should be installed from within Stata by typing "ssc install newsimpact". Windows users should not attempt to download these files with a web browser.
Contact details of provider: Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA
Phone: 617-552-3670
Fax: +1-617-552-2308
Web page:

More information through EDIRC

Order Information: Web:

This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

When requesting a correction, please mention this item's handle: RePEc:boc:bocode:s456925. See general information about how to correct material in RePEc.

For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Christopher F Baum)

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.

This information is provided to you by IDEAS at the Research Division of the Federal Reserve Bank of St. Louis using RePEc data.