二级单元调查三次时的一种两层次样本轮换方法——针对采用两阶段抽样设计的季度调查

A two-layer rotation system with the secondary sampling units interviewed three times——For quarterly surveys with two-stage sampling design

对于采用两阶段抽样设计的季度调查,构造了一种两层次样本轮换方法。该方法中一级单元的样本轮换模式为6 in,二级单元的样本轮换模式为3 in。该方法既保证了相邻两个季度时二级单元的样本拼配率恒为2/3,又保证了一级单元的样本量在轮换过程中保持不变。

A two - layer rotation system is designed for quarterly surveys with two - stage sampling designs. In this system, the rotation patterns for the primary and secondary sampling units are 6 in and 3 in respectively. This system ensures that the there are 2/3 common secondary sampling units for the two adjacent quarters, and also ensures that the sample size for the primary sampling units remain unchanged during rotation process.