Is Two-Phase Sampling Really Better for Estimating Age Composition?
本文比较两阶段抽样与简单随机抽样在估计年龄组成时的效果，发现两阶段抽样的优势取决于调查目标、单位抽样成本和分层对年龄的预测能力，并给出了判断哪种方法更好的方法。
Abstract The two-phase sampling design has been traditionally used in ecology applications to estimate age composition. With regard to both economic and statistical considerations, however, the two-phase design may yield estimates of the age composition that are no better than can be obtained using simple random sampling. This article shows that the optimality of the two-phase sampling design depends upon (a) survey objectives, (b) per-unit sampling costs, and (c) the predictive power of stratum membership on age. Methods are given for determining whether two-phase sampling yields better estimates of the age composition than simple random sampling, accounting for (a), (b), and (c).