• Title/Summary/Keyword: Returns to Scale

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효율적 생산 프론티어를 이용한 연구개발활동의 규모의 보수성 측정 (Measuring Returns to Scale of the R&D Activity Using Efficient Production Frontier)

  • 고민수;이덕주
    • 한국경영과학회:학술대회논문집
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    • 한국경영과학회/대한산업공학회 2003년도 춘계공동학술대회
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    • pp.683-690
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    • 2003
  • This purpose of this research is an attempt to measure and comparatively analyze the efficiencies and RTS(Returns to Scale) using panel data of OECD countries including Korea. In order to achieve this purpose, at first this study used efficient production frontier estimation combined with DEA for obtaining parameter estimates of a efficient production frontier. secondly using estimated results, measured R&D productivity and RTS(Returns to Scale) on all of the OECD countries. thirdly using time-series data related to R&D activity of korea, measured R&D productivity and RTS(Returns to Scale). Finally based on the results of R&D productivity and RTS(Returns to Scale) using efficient production frontier, some policy implications for enhancing the R&D competitiveness and the technological capabilities are discussed.

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Efficiency and Returns to Scale in the Bangladesh Banking Sector: Empirical Evidence from the Slack-Based DEA Method

  • Sufian, Fadzlan;Kamarudin, Fakarudin
    • 아태비즈니스연구
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    • 제5권1호
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    • pp.1-11
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    • 2014
  • The study provides new empirical evidence on the level of profit efficiency and returns to scale of the Bangladesh banking sector. We employ the Slack-Based Data Envelopment Analysis (SBM-DEA) method to assess the level of profit efficiency of individual banks over the years 2004 to 2011. The empirical findings indicate that the Bangladesh banking sector has exhibited the highest and lowest level of profit efficiency during years 2004 and 2011 respectively. We find that only eight banks have been profit efficient throughout the period under study. The empirical findings seem to suggest that most of the Bangladesh banks have been experiencing economies of scale due to being at less than the optimum size, or diseconomies of scale due to being at more than the optimum size. Thus, decreasing or increasing the scale of production could result in cost savings or efficiencies.

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농업·농촌 기반 사회적기업의 부트스트래핑 효율성 분석 (An Analysis of the Efficiency of Agricultural Social Enterprises Using the Stochastic DEA Model)

  • 이상호
    • 한국유기농업학회지
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    • 제29권1호
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    • pp.41-50
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    • 2021
  • This paper analyzes the efficiency of social enterprises by analyzing bootstrapping data envelopment analysis. Unlike the definitive DEA model, we analyze the confidence intervals of efficiency estimates through the DEA model, which takes into account stochastic factors. Major analysis results are summarized as follows: First, the results of the bootstrapping DEA analysis of social enterprises estimated that the technical efficiency was 0.459 and the 95% confidence interval was 0.389 to 0.601. Second, the number of inefficient social enterprises with efficiency values of less than 0.5 was found to be 15 (55.56%) in technical efficiency, 5 (18.52%) in pure technical efficiency, and 8 (29.63%) in scale efficiency. It can be seen that a significant number of social enterprises are operating in an inefficient state. Third, looking at the returns of scale of social enterprises, 25 (67.57%) are currently in the increasing returns of scale, 10 (27.02%) are in the constant returns of scale, and 2 (5.41%) are in decreasing returns of scale. In other words, it can be seen that social enterprises are under-invested in terms of input factors.

발전부문의 불완전경쟁과 생산성 변화 (Imperfect Competition and Productivity: Korean Fossil-fueled Power Generation Sector)

  • 권오상;박호정
    • 자원ㆍ환경경제연구
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    • 제19권1호
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    • pp.3-21
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    • 2010
  • 발전부문의 부분적인 민영화 이후 전력의 도매가격은 한계가격(system marginal price)으로 결정되고, 이 가격은 발전사의 발전량에 의해서 달라지기 때문에 발전사 입장에서는 완전히 외생적으로 결정되는 가격이라 보기 어렵다. 본고는 Harrison(1994), Levinsohn(1993) 등이 개발한 시장의 완전경쟁성이 유지되지 않을 때에도 기업의 생산성 변화와 규모수익성, 마크업률 등을 분석할 수 있는 모형을 한국의 화력발전소 자료에 적용하였다. 분석결과 규모수익은 거의 없으며, 마크업률은 발전소의 사용 에너지 유형에 따라 크게 다른 것으로 나타났다. 아울러 완전경쟁시장을 가정하는 통상적인 분석법에 비해 발전소의 생산성 변화율 계측치도 상당한 정도 차이를 보였다.

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환적화물의 컨테이너 터미널 효율성 분석 (The Data Envelopment Analysis of Container Terminals to Transshipment Cargo)

  • 박홍균
    • 한국항만경제학회지
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    • 제26권1호
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    • pp.1-19
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    • 2010
  • 터미널의 운영은 국가와 지역경제에 영향을 미친다. 부산항과 광양항의 11개 터미널로 GICT, KEC, 동부, KIT, 자성대, 신선대, 감만, 신감만, 우암, 감천, PNC 효율성 분석을 위하여 다양한 DEA(Data Envelopment Analysis)기법들을 이용하여 분석하였다. 신선대, 감만(2007년, 2008년), 신감만(2009년), PNC(2009년)터미널이 규모의 효율성이 1로 나타나 효율적인 것으로 나타났다. 특히, 신감만과 PNC는 2009년에 가장효율성이 높았다. 광양항의 GICT(2009), KEC(2009), 동부(2008-2009), KIT(2009)터미널은 낮은 효율성을 가지고 있는 것으로 나타났다. 감만터미널(2009년)이 규모수익체감(DRS)인 것으로 나타났으며 나머지 터미널은 규모 수익체증(IRS)인 것으로 나타났다. 규모 체감인 항만은 운영상의 효율성을 위한 전략이 필요하며, 규모수익체증인 항만은 규모확대를 통한 효율성 전략을 수립하는 것이 요구된다. 신선대 터미널은 2007년과 2009년까지 현재의 투입요소합을 최소 1.5배 이상 늘려도 100%의 효율성을 유지 할 수 있는 것으로 나타났다. 연도별 동태적 효율성 변화추이는 자성대는 계속 상승하고 있다.

Mutual Fund 수익률의 비정상 함수형 시그널을 위한 다해상도 클러스터 계층구조 (Multi-scale Cluster Hierarchy for Non-stationary Functional Signals of Mutual Fund Returns)

  • 김대룡;정욱
    • 경영과학
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    • 제24권2호
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    • pp.57-72
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    • 2007
  • Many Applications of scientific research have coupled with functional data signal clustering techniques to discover novel characteristics that can be used for the diagnoses of several issues. In this article we present an interpretable multi-scale cluster hierarchy framework for clustering functional data using its multi-aspect frequency information. The suggested method focuses on how to effectively select transformed features/variables in unsupervised manner so that finally reduce the data dimension and achieve the multi-purposed clustering. Specially, we apply our suggested method to mutual fund returns and make superior-performing funds group based on different aspects such as global patterns, seasonal variations, levels of noise, and their combinations. To promise our method producing a quality cluster hierarchy, we give some empirical results under the simulation study and a set of real life data. This research will contribute to financial market analysis and flexibly fit to other research fields with clustering purposes.

Decreasing Return to Scale in Cottage Industries: Empirical Evidence from the Coconut Sugar Industry in Banyumas, Indonesia

  • BADRIAH, Lilis Siti;ARINTOKO, Arintoko;RAHAJUNI, Dijan
    • The Journal of Asian Finance, Economics and Business
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    • 제9권7호
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    • pp.219-229
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    • 2022
  • This study aims to analyze the economies of scale of the cottage industry for coconut sugar production in Banyumas, Indonesia. This study applies a survey method to coconut sugar craftsmen. Data analysis was performed by regression analysis based on the Cobb-Douglas production function approach. The findings indicated that decreasing returns to scale was a problem for the domestic production of coconut sugar. These findings show that the production of coconut sugar is not very productive. Labor and financial capital inputs have a significant positive share but the resulting increase in output is less proportional than the increase in the two inputs. Social capital, experience, and education do not affect industrial performance. To increase input productivity and production efficiency, it is necessary to apply more effective production techniques and technologies to produce quality products so that the selling price can be higher. Additionally, it is required to enhance the sap's quality through its extraction methods and the regrowth of high-yielding coconut tree varieties. From the institutional aspect, the development of this industry requires stronger partnerships with related parties such as local governments, exporting companies, cooperatives, and universities through research and development.

DEA 모형을 이용한 공공연구기관의 기술이전 효율성 분석에 관한 연구 (A Study on the Technology Transfer Efficiency for Public Institutes Using DEA Model)

  • 현만석;유왕진
    • 산업경영시스템학회지
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    • 제31권2호
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    • pp.94-103
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    • 2008
  • This study measured technology transfer efficiency for public institutes. The study made use of DEA being one of the non-parametric linear programming to evaluate technology transfer efficiency for public institutes and to measure technology efficiency, pure technical efficiency and scale efficiency. The measurement of the technology transfer efficiency for public institutes was as follows: The cause of the technology transfer inefficiency was affected by pure technical inefficiency more than by scale inefficiency. Public institutes' RTS(Return To Scale) value varied depending upon the features of the organizations than the features of the regions. Public research institutes' RTS value is more effective than universities' RTS value. We compared the RTS group with the RTS of Projected DMU groups. The RTS group had constant returns to scale effect while the RTS of the Projected DMU had increasing returns to scale effect. The technology transfer efficiency of public institutes varied depending upon the features of the organizations and regions : The technology transfer efficiency of public institutes were as follows : public research institutes at the metropolitan area, public research institutes at the local areas, universities at the metropolitan area and universities at the local areas. In other words, the technology transfer efficiency was affected by organizational characteristics more than by regional characteristics at the place where public institutes were located.

DEA를 이용한 손해보험회사의 효율성 측정에 관한 연구 (A Study on the Efficiency of Property-Liability Insurance Companies using DEA)

  • 민재형;김진한
    • 한국경영과학회지
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    • 제23권2호
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    • pp.201-217
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    • 1998
  • This paper attempts to show how DEA(data envelopment analysis), a nonparametric productivity analysis method, can be employed for insurance companies to improve their respective efficiencies and competitiveness. Specifically, we measured relative technical efficiencies and returns to scale of 11 Korean property-liability insurance companies using BCC model, and raised several issues including the cause of inefficiency, benchmarking toward reference set and resource allocation concerning the insurance companies. Also, in order to monitor the variability of the research results over periods, we employed longitudinal analysis to see the moving patterns of technical efficiencies, returns to scale and frequencies included in the reference set of the individual insurance companies under consideration. The methodology and the results in this paper may also serve as a useful guideline for individual insurance companies to set their respective business strategies.

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