Innovation efficiency and the impact of the institutional quality: a cross-country analysis using the two-stage meta-frontier dynamic network DEA modelSCIENTOMETRICSIF3.52021-02-2223PREAI
Energy Efficiency and Health Efficiency of Old and New EU Member States欧盟新老成员国的能源效率和健康效率FRONTIERS IN PUBLIC HEALTHIF3.42020-06-0915OAAI