# Unveiling the knowledge structure of technological forecasting and social change (1969–2020) through an NMF-based hierarchical topic model

> Research article (Technological Forecasting and Social Change, 2021) · cited 25× · AI/ML

**Wikidata**: [openalex:W3209907087](https://www.wikidata.org/wiki/openalex:W3209907087)  
**Source**: https://4ort.xyz/entity/unveiling-the-knowledge-structure-of-technological-forecasting-and-social-change-19692020-through-an-nmf-based-hierarchi