# On endogenizing direction vectors in parametric directional distance function-based models

> Research article (European Journal of Operational Research, 2017) · cited 50× · AI/ML

**Wikidata**: [openalex:W2602194630](https://www.wikidata.org/wiki/openalex:W2602194630)  
**Source**: https://4ort.xyz/entity/on-endogenizing-direction-vectors-in-parametric-directional-distance-function-based-models