# Invention in energy technologies: Comparing energy efficiency and renewable energy inventions at the firm level

> Research article (Energy Policy, 2015) · cited 50× · AI/ML

**Wikidata**: [openalex:W3121672500](https://www.wikidata.org/wiki/openalex:W3121672500)  
**Source**: https://4ort.xyz/entity/invention-in-energy-technologies-comparing-energy-efficiency-and-renewable-energy-inventions-at-the-firm-level