用于估计难以计数人群规模的网络扩大法研究进展

Development of the network scale-up method for size estimation on hard-to-count populations

网络扩大法（NSU法）基于社会学“社会网络”理论，调查过程避免了直接估计难以计数的人群规模，可行性强；一次调查可以同时估计多个人群，被认为是一种较有应用前景的估计方法。此文主要就NSU法的历史背景、原理及应用、最新进展等方面进行综述。

Network scale-up （NSU） method which based on the theory of social network in sociology is a new method developed recently mainly to estimate the sizes of hard-to-count populations. It is easy to conduct into practice, since the process requires only contacting with the general population and not specifically with the hidden and hhrd-tocount population. The method is relatively inexpensive and offers the advantage of being able to estimate the sizes of several different populations in a single survey. NSU seems to be a promising method in estimating sizes of hard-to-count populations. The introduction in aspects of background, theory and recently research development about NSU are reviewed.