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arXiv 2002.01350stat.ME
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网络抽样的新估计

New estimates for network sampling

Steve Thompson

摘要:

网络抽样在世界各地用于调查脆弱、难以接触的人群,包括有艾滋病毒、阿片类药物滥用和新出现的流行病风险的人群。抽样方法包括跟踪社会联系,以增加新的人的样本。目前这些调查的估计是不准确的,偏差和均方误差很大,置信区间也不可靠。新的估计在这里引入消除几乎所有的偏差,有更低的均方误差,并使置信区间具有良好的性能。通过避免对总体网络和设计的不切实际的假设,而是使用样本网络数据的拓扑结构以及实际使用的抽样设计来实现改进。在模拟使用真实网络的风险人口,新的估计消除了几乎所有的偏差,并有均方误差是2至92倍低于目前的估计。新的估计是有效的,与各种各样的网络设计,包括那些具有强烈限制的分支,如响应者驱动的抽样和自由分支设计,如雪球抽样。

英文摘要:

Network sampling is used around the world for surveys of vulnerable, hard-to-reach populations including people at risk for HIV, opioid misuse, and emerging epidemics. The sampling methods include tracing social links to add new people to the sample. Current estimates from these surveys are inaccurate, with large biases and mean squared errors and unreliable confidence intervals. New estimators are introduced here which eliminate almost all of the bias, have much lower mean squared error, and enable confidence intervals with good properties. The improvement is attained by avoiding unrealistic assumptions about the population network and the design, instead using the topology of the sample network data together with the sampling design actually used. In simulations using the real network of an at-risk population, the new estimates eliminate almost all the bias and have mean squared-errors that are 2 to 92 times lower than those of current estimators. The new estimators are effective with a wide variety of network designs including those with strongly restricted branching such as Respondent-Driven Sampling and freely branching designs such as Snowball Sampling.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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