in this article, we will estimate efficiency amountof decision-making unit by offering the continuous piecewise polynomialextrapolation and interpolation by ccr model input-oriented on the assumptionthat it is constant returns to scale in different times. and finally, we willestimate efficiency amount of decision-making unit indifferent times byoffering an example.

This paper highlights a tension between semiparametric efficiency and bootstrap consistency in the context of canonical estimation problem, namely problem estimating average density. It is shown that although simple plug-in estimators suffer from bias problems preventing them achieving under minimal smoothness conditions, nonparametric automatically corrects for this that, as result, these seem...

This version of January 26, 2007. German chemical manufacturing industry experienced a major downsizing during 1992–2004. On the average, size of the firm almost halved. Using modern frontier efficiency analysis, this paper investigates technical and scale efficiency of firms. Based on reliable census data, analysis suggests that firms were not primarily concerned with improving technical effic...

aims: textile wastewaters are the most important health and environmental problems in kashan. this research was aimed to compare the poly aluminum chloride and chlorinated cuprous efficiency for removal of chemical oxygen demand (cod) and color from kashan textile industries company wastewater. materials & methods: this experimental bench scale study in a batch system was conducted on 20 compos...

P omegranate product in Khash city causes this city enjoys a considerable advantage in terms of the production of this product. In this paper the performance of Khash township pomegranate producers was evaluated with a comprehensive analysis of supercharged performance. In this regard, the relevant information to complete the questionnaire in 2015 pomegranate growers in Khash city, w...

in this paper, it is assumed that the “decision making units“( ) are consist of positive and negative input and output. firstly, the optimistic and pessimistic models have been suggested by using negative data and then units with most productive scale size are measured in optimistic and pessimistic models. these productive values are compared with double frontiers and hurwicz’s criterion to obt...