The impact of oil crisis on innovation for alternative sources of energy: is there an asymmetric response when oil prices go up or down? 3rd Annual Meeting of the Portuguese Association of Energy Economics & 5th Meeting of Environmental and Energy Economics Conference Paper Inês Nunes Publication Year of Publication: 2019 Identifiers Locators URL https://doi.org/10.21814/uminho.ed.3 DOI: 10.21814/uminho.ed.3 Sustainable Development Goals