# Combination of top-down and bottom-up DEA models using PCA: A two-stage network DEA with shared input and undesirable output for evaluation of the road transport sector

> Research article (Socio-Economic Planning Sciences, 2023) · cited 16× · AI/ML

**Wikidata**: [openalex:W4386034888](https://www.wikidata.org/wiki/openalex:W4386034888)  
**Source**: https://4ort.xyz/entity/combination-of-top-down-and-bottom-up-dea-models-using-pca-a-two-stage-network-dea-with-shared-input-and-undesirable-out