نتایج جستجو برای: Returns-to-scale (RTS)

تعداد نتایج: 10722379  

Journal: :international journal of data envelopment analysis 0
farshid emami department of mathematics, shahid rajaee teacher training university, lavizan, tehran, iran toktam nasirzade tabrizi department of mathematics, science and research branch, islamic azad university

the measurement of rts amounts measures a relationship between inputs and outputs in a production structure. there are many different ways to calculate rts in primal or dual space. but in more realistic cases, governments usually intervene on dmu’s behavior as regulatory agency, this clearly represent a set of limitations and restrictions on behaviors of dmus, so very few decisions in dmus are ...

Journal: :international journal of data envelopment analysis 2013
r. eslami a. davodabadi farahani

this research identifies returns to scale (rts) of efficient decision making units (dmus) with desirable (good) and undesirable (bad) inputs and outputs by presenting a new dea (data envelopment analysis) approach. in this study, we first introduce a new input-output oriented model to determine efficient dmus in the presence of undesirable factors and then, returns to scale of these dmus are es...

F .Emami H .Safdari M .Rostamy malkhalifeh

The calculation of RTS amounts to measuring a relationship between inputs and outputs in a production structure. There are many methods to measure RTS in the primal space or the dual space. One of the main approaches is using the multiplier on the convexity constraint. But returns to scale measurements in DEA models are affected by the presence of regulatory constraints. These additional constr...

Farshid Emami Toktam Nasirzade Tabrizi

The measurement of RTS amounts measures a relationship between inputs and outputs in a production structure. There are many different ways to calculate RTS in primal or dual space. But in more realistic cases, governments usually intervene on DMU’s behavior as regulatory agency, this clearly represent a set of limitations and restrictions on behaviors of DMUs, So very few decisions in DMUs are ...

A. Davodabadi Farahani R. Eslami

This research identifies returns to scale (RTS) of efficient decision making units (DMUs) with desirable (good) and undesirable (bad) inputs and outputs by presenting a new DEA (data envelopment analysis) approach. In this study, we first introduce a new input-output oriented model to determine efficient DMUs in the presence of undesirable factors and then, returns to scale of these DMUs are es...

Journal: :international journal of data envelopment analysis 0
f .emami department of mathematics, shahid rajaee teacher university, lavizan, tehran, iran. p.o.box 16785-163 m .rostamy malkhalifeh department of mathematics, science and research branch, islamic azad university, tehran, iran. h .safdari department of mathematics, shahid rajaee teacher university, lavizan, tehran, iran. p.o.box 16785-163

the calculation of rts amounts to measuring a relationship between inputs and outputs in a production structure. there are many methods to measure rts in the primal space or the dual space. one of the main approaches is using the multiplier on the convexity constraint. but returns to scale measurements in dea models are affected by the presence of regulatory constraints. these additional constr...

A. Payan F. Hosseinzadeh Lotfi M. Omidi M. Rostamy-Malkhalifeh,

Determining the type of returns to scale (RTS) and identifying stability region for RTS of evaluating unit are appropriate abilities for forecasting the future the unit when its size is changed. This paper aims to introduce RTS sustainability of frontier decision making units (DMUs) in data envelopment analysis (DEA). Based on the importance of RTS in relation to decisions of managers, differen...

Journal: :iranian journal of science and technology (sciences) 2011
m. mardani shahrbabak

sueyoshi and sekitani in 2007 presented a paper that explores the measurement of returns to scale under a possible occurrence of multiple solution in a reference set and a supporting hyperplane. the occurrence ofmultiple solutions is classified into type i and type ii. type i is an occurrence of multiple solutions in a reference set. type ii is an occurrence of multiple solutions on a supportin...

2002
Sourafel Girma Holger Görg

This paper calculates returns to scale and productivity growth (allowing for nonconstant returns to scale) in UK manufacturing establishments in the electronics and food industries. Our results show that foreign establishments tend to have lower returns to scale than their domestic counterparts. We also examine the effect of the acquisition of a domestic establishment by a foreign owner on retu...

1998
Lawrence M. Seiford Joe Zhu

This paper discusses the determination of returns to scale (RTS) in data envelopment analysis (DEA). Three basic RTS methods and their modi®cations are reviewed and the equivalence between these di€erent RTS methods is presented. The e€ect of multiple optimal DEA solutions on the RTS estimation is studied. It is shown that possible alternate optimal solutions only a€ect the estimation of RTS on...

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