h the input x. Note that for
inputs with dimensions (e.g. <code>matrix</code>, <code>data.frame</code>) a <code>matrix</code>
object will be returned.</p>
    </div>
    <div class="section level2">
    <h2 id="references">References<a class="anchor" aria-label="anchor" href="#references"></a></h2>
    <p>Corbae, D., Ouliaris, S., &amp; Phillips, P. (2002), Band Spectral Regression with
Trending-Data. <em>Econometrica</em> <b>70</b>(3), pp. 1067-1109.</p>
<p>Corbae, D. &amp; Ouliaris, S. (2006), Extracting 