HP filter of observable variables in Eviews

Estimation ML/Bayesian estimation
1

Hi.
In EViews econometric software we can obtain cycle and trend component of a variable such as : log(GDP).

I don’t know this filter in Eviews is one-sided HP filter or two-sided HP filter?

Although when we use this filter in Eviews cycle component mean is near zero.Many researchers work with this HP-filter in EViews.

2

http://www.eviews.com/help/helpintro.html#page/content/series-Hodrick-Prescott_Filter.html clearly shows it’s two-sided.