# Enhancing Validity in Observational Settings When Replication is Not Possible

> Research article (Political Science Research and Methods, 2017) · cited 21× · AI/ML

**Wikidata**: [openalex:W3122927233](https://www.wikidata.org/wiki/openalex:W3122927233)  
**Source**: https://4ort.xyz/entity/enhancing-validity-in-observational-settings-when-replication-is-not-possible