Slack-adjusted DEA for time series analysis: Performance measurement of Japanese electric power generation industry in 1984–1993

摘要: Abstract Using a new slack-adjusted data envelopment analysis (SA-DEA) model which explicitly incorporates an influence of slacks into its efficiency measurement, this study discusses use various efficiencies and index measures for DEA dynamic analysis. An analytical formulation to determine the type return scale (RTS) is proposed model. This paper mathematically when multiple solutions occur on RTS how deal with such difficulty. As important case study, applies approach examine performance Japanese electric power generation companies from 1984 1993. Two policy implications are suggested guiding industry.