经常性调查

在有限总体的抽样调查理论中，辅助信息的应用和轮换样本方法在经常性调查中占有重要的地位。

In sampling finite populations , it is important to use the auxiliary information and the replacement policy in repeated surveys .

统计调查应当以周期性普查为基础，以经常性抽样调查为主体，以必要的统计报表、重点调查、综合分析等为补充，搜集、整理基本统计资料。

Statistical investigation shall be conducted to collect and sort out basic statistical data mainly through regular sampling surveys on the basis of cyclic general surveys and supplemented by statistical reports , major surveys and comprehensive analysis .

可以官方统计与非官方统计相结合；要建立和完善服务业企业经常性统计调查方法制度。

Attention also should be paid to the harmony of department statistics and professional statistics , the combination of official and unofficial statistics , as well as the building and perfection of periodical statistic survey methods and system of enterprises of service sector .