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In this paper, we adopt a recent OECD framework and examine the role of external policy tools and internal firm specific factors for stimulating three different types of eco-innovations that range on a spectrum of lower to higher technological and environmental impacts: End-of-Pipeline Pollution Control Technologies, Integrated Cleaner Production Technologies and Environmental R&D. Using a novel firm-level dataset from a DEFRA survey, we estimate a Tobit model, which provides empirical evidence showing that these eco-innovations are motivated by different external policy tools and internal firm specific factors. Our findings indicate that End of Pipeline Technologies and Integrated Cleaner Production Technologies are mainly driven by equipment upgrade motives with a view of improving efficiency while environmental regulations are effective in stimulating the End-of-Pipeline technologies and Environmental R&D. Interestingly, alongside government induced regulations, we find that market factors, mainly motivated by cost savings, are effective in driving Environmental R&D. Finally, ISO14001 certification is effective in strengthening the positive impact of environmental management systems on both End-of-Pipeline technologies and Environmental R&D while CSR policies have no significant impact on motivating any of the eco-innovations. [Copyright &y& Elsevier]

Abstract: It is frequently hypothesized that environmental management systems (EMSs) may improve firms'' environmental innovation performance. Whether this hypothesis is true is as critical for environmental policy as questions pertaining to the relevant incentives for (1) a firm''s voluntary adoption of an EMS and (2) its environmental innovation behavior. Based on ample empirical evidence for German manufacturing, this paper addresses the simultaneity of these issues on the basis of a recursive bivariate probit model that explores the hypothesis that a facility''s decision on innovation activities is correlated with the decision on EMS adoption. Our empirical results, indicating that environmental innovation activities are not associated with EMS implementation nor any other single policy instrument, reflect the perceptions of the survey respondents and, hence, should be interpreted as correlations rather than causal relationships. According to these perceptions, innovation behavior seems to be mainly correlated with the stringency of environmental policy. [Copyright &y& Elsevier]