How do internal, market and institutional factors affect the development of eco-innovation in firms?

This paper investigates how drivers affect the development of eco-innovation in firms. Our research classifies three categories: internal factors, market and institutional factors. Using a sample with 9172 firms from Spanish Innovation Survey Panel, we study impact for energy environmental efficiency objectives. utilizes combination two methods: Ordinal Logit Regression Models Artificial Neural Networks. The results allow us to compare each variable. From methodological point view, this approach allows overcoming difficulties performing regression analysis, mainly due low levels explained variance problem comparing coefficients obtained. Networks it is observed that factor most affects previous experiences eco-innovation, compared variables such as external financing or innovation capabilities, which have very small impact. These may important repercussions view developing incentive policies.