# Instrument approval by the Sargan test and its consequences for coefficient estimation

> Research article (Economics Letters, 2021) · cited 36× · AI/ML

**Wikidata**: [openalex:W3166273316](https://www.wikidata.org/wiki/openalex:W3166273316)  
**Source**: https://4ort.xyz/entity/instrument-approval-by-the-sargan-test-and-its-consequences-for-coefficient-estimation