Estimation of Gentan Probability Based on the Forest Resource Table

Abstract

This paper first discusses the censoring and truncation occurred in the data from forest resource table in estimating Gentan Probability. Based on the discussion, a method of maximum likelihood to estimate Gentan Probability is developed, and the properties of the methods introduced by Suzuki and Blandon are reconsidered. Both Blandon’s method and the newly developed method are suitable for data with the censoring and truncation and performed well in a simulation. But Suzuki’s method appeared to have problems and performed worse. Although it has been said that the estimation of Gentan Probability shouldn’t depend on the age structure at the beginning of the observation period, it is concluded that the dependence itself is not a problem if censoring and truncation are well taken into account.