论文标题
使用调查数据获取更多代表性的站点样本进行影响研究
Using Survey Data to Obtain More Representative Site Samples for Impact Studies
论文作者
论文摘要
为了提高影响评估的普遍性，最近的研究检查了选择站点的代表性样本的统计方法。但是，这些方法依赖于目标人群中所有站点的影响主持人的丰富数据。本文提供了一种新的方法，可以在可用影响主持人的丰富数据时选择撞击研究的站点，但仅来自基于影响研究目标人群的代表性样本的调查。调查数据用于（1）估计人口中具有某些特征的地点的比例，以及（2）样品中具有不同特征的地点数量的限制。主要研究人员强制执行限制，以确保在最终样本中不会过分代表某些类型的站点。这些限制可以分层在现场选择和招聘方法之上，以提高样本的代表性。
To improve the generalizability of impact evaluations, recent research has examined statistical methods for selecting representative samples of sites. However, these methods rely on having rich data on impact moderators for all sites in the target population. This paper offers a new approach to selecting sites for impact studies when rich data on impact moderators are available, but only from a survey based on a representative sample of the impact study's target population. Survey data are used to (1) estimate the proportion of sites in the population with certain characteristics, and (2) set limits on the number of sites with different characteristics that the sample can include. The Principal Investigator enforces the limits to ensure that certain types of sites are not overrepresented in the final sample. These limits can be layered on top of site selection and recruitment approaches to improve the representativeness of the sample.
