This thread is about l1filter add-in.
The add-in allows you to extract a piecewise linear trend by primal-dual interior point method proposed by Kim et al. (2009). It is an alternative trend estimation method to well-known Hodrick-Prescott filter, but can also be used in determining the break (kink) points in a time series. For further instructions, please see the documentation that comes with the add-in and the EViews' blog post.
For questions about EViews Add-ins available from the EViews Add-ins webpage. Note each add-in available on our webpage will have its own individual thread.
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