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China’s regional energy and environmental efficiency: A DEA window analysis based dynamic evaluation[J] . Ke Wang,Shiwei Yu,Wei Zhang.Mathematical and Computer Modelling . 2013 (5-6)
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Innovation and diffusion of clean/green technology: Can patent commons help?[J] . Bronwyn H. Hall,Christian Helmers.Journal of Environmental Economics and Management . 2013 (1)
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Environmental performance, innovation and spillovers. Evidence from a regional NAMEA[J] . Valeria Costantini,Massimiliano Mazzanti,Anna Montini.Ecological Economics . 2013