Assessing External Validity
收藏数据链接：
官方服务：
资源简介：
In designing any causal study, steps must be taken to address both internal and external threats to its validity. Researchers tend to focus primarily on dealing with threats to internal validity. However, once they have conducted an internally valid analysis, that analysis yields an established set
提供机构：
美国国家经济研究局创建时间：
2019-11-01
