Eco-efficiency of the world cement industry: A data envelopment analysis

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An Efficiency Perspective on Carbon Emissions and Financial Performance (2020, background): “Related studies applying comparable directional vectors also tend to find relatively low average carbon efficiency levels (Oggioni et al., 2011; Picazo-Tadeo et al., 2014; Wang et al., 2012; Zhang et al., 2008).”
Industry-level Total-factor Energy Efficiency in Developed Countries (2011, unknown): “Previous country-comparative studies measure energy efficiency by country for nationwide energy use [40–44], by country for a particular industry’s energy use [46,47], by region within a country [45,51–56], and by industry within a country [49,50].”
Energy efficiency, CO2 emission performance and technology gaps in fossil fuel electricity generation in Korea: A meta-frontier non-radial directional distance functionanalysis (2013, unknown): “Oh (2010) and Chiu et al.”
Power Industry Restructuring and Eco-Efficiency Changes: A New Slacks-Based Model in Malmquist- Luenberger Index Measurement (2014, background): “…literature, many kinds of undesirable factors are reported, but our focus is mainly on emissions such as SO2, NOx, and CO2 gases (Burnett and Hansen, 2008; Korhonen and Luptacik, 2004; Oggioni et al., 2011; Oude Lansink and Bezlepkin, 2003; Tyteca, 1997; Zaim and Taskin, 2000; Zhou et al., 2007).”