# Measuring efficiency in a general production possibility set allowing for negative data

> Research article (European Journal of Operational Research, 2019) · cited 24× · AI/ML

**Wikidata**: [openalex:W2982094365](https://www.wikidata.org/wiki/openalex:W2982094365)  
**Source**: https://4ort.xyz/entity/measuring-efficiency-in-a-general-production-possibility-set-allowing-for-negative-data