# Constructed Second Control Groups and Attenuation of Unmeasured Biases

> Research article (Journal of the American Statistical Association, 2015) · cited 26× · AI/ML

**Wikidata**: [openalex:W1930406702](https://www.wikidata.org/wiki/openalex:W1930406702)  
**Source**: https://4ort.xyz/entity/constructed-second-control-groups-and-attenuation-of-unmeasured-biases