侯志强 李 勇
摘 要:针对采用三阶段抽样设计的劳动力季度调查,构造了一种三级单元调查四次时的三层次样本轮换方法。该方法中,一级单元的样本轮换模式为16 in,二级单元的样本轮换模式为8in,三级单元的样本轮换模式为4in。该方法保证了各级单元的样本拼配率不随轮换过程而改变,并使得相邻两个季度时三级单元的样本拼配率为3/4。
关键词:三阶段抽样;季度调查;样本轮换;轮换方法
中图分类号:C811 文献标识码:A 文章编号:1008-6439(2008)02-0102-04
A three-layer rotation system with tertiary sampling units interviewed four times—Quarterly surveys with three-stage sampling designs
HOU Zhi-qiang1,3,LI Yong2
(1. Department of Statistics,North China University of Technology,Beijing 100041,China;
2. Mathematics and Statistics College,Chongqing Technology and Business University,Chongqing 400067,China;
3. School of Statistics,Renmin University of China,Beijing 100872,China)
Abstract:A three-layer rotation system with the tertiary sampling units interviewed four times is constructed for quarterly surveys with three-stage sampling designs. In this system,the rotation patterns for the primary,secondary and tertiary sampling units are 16 in,8 in,and 4 in respectively. Furthermore,the matching rates for every level unit are kept unchanged during rotation process and the matching rate for tertiary sampling units is 3/4 under this system.
Key words:three-stage sampling method;quarterly survey;sample rotation;rotation system
一、引言
世界上大多数国家或地区都已开展劳动力调查[1],除了极少数国家或地区外,大部分国家或地区对其劳动力调查实施样本轮换。在实施样本轮换的国家或地区中,大部分国家的样本轮换为单层次样本轮换,即只轮换最终抽样单元,极少数国家或地区实施了两层次样本轮换,既轮换最终抽样单元,又轮换其上一级抽样单元。如台湾地区人力资源调查[2],其采用了两阶段抽样设计,每个月进行一次,第一级抽样单元为村里,第二级抽样单元为住址,对村里实施的样本轮换模式为4-8-4(8),对住址实施的样本轮换模式为2-10-2(4)。日本劳动力调查[3]也采用了同样的两层次样本轮换方法。迄今为止,还没有哪个国家或地区的劳动力调查实施三层次样本轮换。对于采用三阶段抽样设计的月度调查,笔者曾经构造了一种三层次样本轮换方法[4]。该方法中,一级单元的样本轮换模式为8-4-8(16),二级单元的样本轮换模式为4-8-4(8),三级单元的样本轮换模式为2-10-2(4)。……