%0 Article
%T Cut-off importance sampling of bole volume.
%A Robinson, Andrew P.
%A Gregoire, Timothy G.
%A Valentine, Harry T.
%D 1997
%J Silva Fennica
%V 31
%N 2
%R doi:10.14214/sf.a8516
%U https://silvafennica.fi/article/5615
%X <p>Cut-off importance sampling (CIS) is introduced as a means of sampling individual trees for the purpose of estimating bole volume. The novel feature of this variant of importance sampling is the establishment on the bole of a cut-off height, H<sub>C</sub>, above which sampling is precluded. An estimator of bole volume between predetermined heights H<sub>L</sub> and H<sub>U</sub> &gt; H<sub>C</sub> is proposed, and its design-based bias and mean square error are derived. In an application of CIS as the second stage of a two-stage sample to estimate aggregate bole volume, the gain in precision realized from CIS more than offset its bias when compared to the precision of importance sampling when H<sub>C</sub> = H<sub>U</sub>.</p>