This paper focuses on the relevant drivers of eco-innovation in 5,135 small and medium-sized enterprises (SMEs). In particular, we study if there are differences between the determinants of end-of-pipe and adoption of cleaner technologies between small and medium firms located in 27 European countries. Using a bivariate probit, significant differences comparing small with medium firms are found. Network involvement measured by cooperation with universities and research agencies is essential in both types of eco-innovation in small firms, but not for mid-sized firms. With regard to environmental regulation, subsidies are important only for small firms, especially for the adoption of cleaner technologies. On the contrary side, existing environmental regulation is a key factor to explain the adoption of cleaner technologies for medium firms but not for smaller ones.
The main purpose of this paper is to analyse the association between open inbound knowledge strategies and the performance of eco‐innovative firms in the food and beverage industry. We propose a mixed framework based on the eco‐innovation literature and the open innovation approach. We consider the characteristics in a traditional sector based upon a resource‐based perspective. Three types of firms are distinguished in terms of their sales growth in the Spanish food industry from the least to the most successful eco‐innovators. Using multinomial logistic regression models, it is shown that the diversity of collaborators (breadth of external sources of knowledge) and joint adoption of product and process eco‐innovations are positively associated with the probability of achieving high sales growth. Moreover, we find an inverted U‐shaped relationship between the breadth of the external search and firm performance, but only for the group of the most successful firms. Moreover, operational flexibility, knowledge‐based capabilities and company size are also positively related to the group of successful eco‐innovators.
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