摘要：This paper presents an evaluation of technical efficiency and time-dependent changesin productivity of Polish professional electric power and heat & electric power stations by using Data Envelopment Analysis non-parametric method.The research covered the enterprises whose total available electric power amounted to about 98% of that of all professional thermal electric power stations in this country.The analysis has concerned the years 2000÷2004.Impact was considered of such factors as: scale of enterprise activity,form of ownership as well as type of carried out activity,on technical efficiency and time-dependent productivity changes.Changes in productivity of the power generation sector were determined by means of Malmquist index.
关键词：Data Envelopment Analysis (DEA);technical efficiency;Malmquist index;thermal power generation
