Park, Ha Sung; Kim, Daecheol - In: Journal of Open Innovation: Technology, Market, and … 5 (2019) 1, pp. 1-14
the variable returns to scale (VRS) models, and the slack-based measure (SBM) were used for the analysis. As a result of … the efficiency analysis, there were three efficient zinc smelters in the CRS model, 14 in the VRS model and 14 in the SBM …. The average efficiency was 0.458 based on the SBM, which indicates that there is room for improvement in efficiency. In …