• 자원ㆍ환경경제연구
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• 제15권2호
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• pp.177-200
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• 2006

최근 수확불변 하에서의 오염처리비용회피활동(pollution haven activities)에 대한 연구는 많이 진행되어 왔으나 수확체증 하에서의 연구는 미미한 실정이다. 1990년대 이후 수확체증 하에서의 교역이론이 산업 재배치에 대한 문제를 다루면서 수확체증과 오염처리비용회피활동 간의 관계를 살피는 것은 의미 있는 일이다. Davis (1998)가 발표한 수확체증 하에서의 자국시장효과(home market effect)에 대한 모형을 응용하여 환경정책이 산업 재배치에 주는 효과를 분석한 결과 시장규모가 적은 지역에서 오염물처리에 대한 책임을 생산자가 담당하는 지역과 시장규모가 크면서 오염물로 인한 비효용을 거주자가 감내하는 지역과의 교역상황에서 교역장벽이 높을 때 일부 공해산업에 대해 오염처리비용회피효과가 존재하나 교역장벽이 낮아지면서 공해산업뿐만 아니라 저공해산업에서도 산업의 지역이탈이 관찰되어 오염처리비용회피활동에 대한 식별이 힘들어지며 오염처리비용회피효과(pollution haven effect)뿐만 아니라 오염처리비용회피가설(pollution haven hypothesis)이 동시에 성립됨을 보일 수 있었다. 따라서 시장규모가 작으나 환경보전가치가 높아 환경규제가 강한 지역에서 환경보전과 지역경제발전을 동시에 도모하기 위해서는 오염처리기술의 생산성을 높이기 위한 활동이 필수적이다.

• 대한안전경영과학회지
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• 제17권4호
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• pp.87-96
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• 2015

This study analyzed the safety management efficiency through input-oriented BCC Model using DEA by making of Models, in which this study selected the number of staff affiliated with the construction site, number of staff members on the construction team, and number of safety personnel as Input Factor, along with the number of disaster victims and zero-accident accomplished hours as output elements, targeting 40-or-so apartment building construction sites which are being built by 3 domestic construction companies. As a result of efficiency, it was 0.643, the number of efficient DMU was 4. In the aspect of returns to scale, 21 construction sites(52.5%) found to be in a state of increasing returns while 14 construction sites(35%) was in a state of Decreasing returns. The reason for inefficiency was found to lie in technical factors in case of 30 construction sites(75%). Lastly, inefficient DMU is in need of 38.9 % and 66% reduction in site personnel and safety personnel. Based on study results, the 29 construction sites accounting for 72.5% of DMU for safety management efficiency evaluation object turned out to do inefficient safety management that doesn't fit the size of each company.

• Asia pacific journal of information systems
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• 제13권4호
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• pp.229-255
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• 2003

This article attempts to examine the well-known law that the increasing returns to scale(IRS) is effective in the Internet business. The effect of IRS is one of the hottest issues in the Internet business sector. Many cases and survey studies support the fact that the IRS phenomenon exists in the Internet business. Executives in Internet business generally give a deep trust on this theory. As the Internet business grows, however, the boundary of the business becomes widened and complicated. And each category of Internet business is characterized with a different business style and economic behavior. It may, therefore, be dangerous to accept that the phenomenon of IRS is applied to all areas of Internet business. For this reason, the research for the close look into the IRS phenomenon should provide significant implications for the managers in the Internet business industry. This article divides the internet business into four sub-areas, and analyzes the IRS phenomenon using AHP/DEA-based full ordering technique. Interpretations are given, based upon the research results, for each sub-area of Internet business, as a guideline of setting business strategies for practical managers.

• 한국IT서비스학회지
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• 제16권4호
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• pp.1-13
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• 2017

This study examines how specific technology from Information and Communications Technology (ICT)-which plays a critical role in increasing productivity by promoting a spread of technology across the society though the use of big data, mobile or wearable devices-impacts of the productivity of society and productivity of added values, respectively. The impact of technology was studied from the perspective of efficiency levels of input. In order to provide an analysis, we have categorized ICT into 16 specific technologies and have set the number of companies and number of employees each as an input factor while setting the respective output and the output of added values as an output factor. Afterwards, we have applied data envelopment analysis (DEA) which is a form of nonparametric frontier analysis and measured the productivity and efficiency of added values for each technology. According to the analysis results, there were 2 technologies by the CRS standards, and 3 technologies by the VRS standards that showed relative efficiency levels. We have also presented some efficiency improvement strategies for specific technologies that revealed relative inefficiency and offered a reference set and projection point. In addition, we provide an analysis on scale efficiencies (SE), diminishing returns to scale (DRS), and increasing returns to scale (IRS) of each ICT.

• 한국산학기술학회논문지
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• 제20권5호
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• pp.163-169
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• 2019

본 연구는 산업 내 경쟁정도가 기업의 보유현금의 변화에 따른 초과수익률에 미치는 영향에 관해 검증하였다. 경쟁기업 간 위협은 기업의 성과가 좋지 않을 경우 경영자가 교체될 가능성을 높여 경영자가 최선의 노력을 다하여 경영을 하도록 규율하는 기능을 하고, 기업이 공시하는 정보의 양과 질을 향상시킨다. 즉 경쟁이 치열해질수록 대리인 문제가 감소하여 해당 기업의 보유현금의 증가에 대한 초과수익률은 증가할 것으로 예상된다. 반면 경쟁이 심한 산업에 속한 기업은 자세한 정보가 공시되면 경쟁 기업들이 해당 정보를 역이용하여 보다 유리한 위치에서 경쟁할 수 있기 때문에 정보비대칭이 오히려 증가한다는 의견도 존재한다. 이러한 경우 외부 이해관계자들은 기업의 상황을 정확히 파악하지 못하게 되어 경영자가 사적이익을 얻을 목적으로 기회주의적으로 현금을 운용하여도 이를 감독하거나 통제하지 못하게 된다. 이에 따라 시장경쟁이 심해질수록 보유현금의 증가에 대한 초과수익률은 감소할 것으로 예측된다. 분석 결과, 산업 내 경쟁정도가 증가할수록 보유현금의 증가에 대한 초과수익률은 높아지는 것으로 나타나 경쟁의 긍정적 효과를 지지하는 결과를 발견하였다. 본 연구는 시장경쟁이 효과적인 외부 기업지배구조로 작용하여 투자자들이 기업의 현금이 효율적으로 운용된다고 인식함에 따라 해당 기업의 보유현금의 증가에 대해 긍정적으로 평가한다는 실증적인 근거를 제시하였다는 측면에서 공헌점을 찾을 수 있다.

• 경영과학
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• 제17권3호
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• pp.181-201
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• 2000

This paper performs a case study on an Internet business networking company, oneQ.com. We define the functions of Internet business networker and discuss its characteristics such as network effect, lock-in effect, and increasing returns etc. Through reviewing the business models, strategies, and implemented technologies of the oneQ.com, we investigate the applicability and effectiveness of the Internet business networker as well as its research implications.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2003년도 추계학술발표대회 논문집
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• pp.146-149
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• 2003

Two-way shape memory effect(TWSME) under residual stresses are considered in the present study. The structure using two-way shape memory alloy(SMA) concept returns to its initial shape by increasing or decreasing temperature under the initially given residual stress. In the present study, we use a thermo-mechanical constitutive equation of SMA and laminated composite plates are considered as simple morphing structural components which are based on first order shear deformable laminated composite plate with large deflection. Numerical results of fully coupled SMA-composite structures are presented

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2004년도 춘계학술발표대회 논문집
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• pp.123-126
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• 2004

Two-way shape memory effect(TWSME) under residual stresses are considered in the present study. The structure using two-way shape memory effect concept returns to its initial shape by increasing or decreasing temperature under the initially given residual stress. In the present study, we use a thermo-mechanical constitutive equation of SMA and laminated composite beam are considered as simple morphing structural components which are based on large deformable 2D composite beam theory. Numerical results of fully coupled SMA-composite structures are presented.

• 한국유기농업학회지
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• 제22권4호
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• pp.581-591
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• 2014

This study analyze the policy efficiency of the environment-friendly farming zone program using data envelopment analysis. On analyzed results, the average policy efficiency is 0.185 and 98.3% of zones are inefficient. 97.8% of zones are in increasing returns to scales. The empirical results indicate that more work need to be done to increase the efficiency of the program.

• Asian-Australasian Journal of Animal Sciences
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• 제15권8호
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• pp.1110-1114
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• 2002

The animal production sector in Jordan is characterized by shortages of locally produced feedstuffs derived from rangeland, forage plants or from human food crops as by products. This is exacerbated by insufficient rainfall, overgrazing, early grazing and high stocking rate. Thus, subject to these constraints, other technological improvements are highly desirable to meet the needs of crop growth and animal production. Alternative adapted technologies are also desirable in order to meet the increased demand for red meat in relation to population growth along with the changes in the price subsidy for feedstuff. The technologies are those, which have been introduced to the animal production sector, obtained in agricultural research stations besides on-farm demonstrations. They include technologies suited for increasing birth and twining rates, synchronizing the mating period, introducing the early weaning method, and animal feed and sheep production. Economic assessments conducted in this study demonstrate promising results of hormonal and nutritional practices in improving production efficiency of Awassi sheep in Jordan. Jordanian published data between 1991 and 1998 were used. The examined practices were: 1) use of PMSG in estrus synchronization in ewes, 2) introduction of early lamb weaning program, 3) supplementation with $AD_3E$ for ewes and 4) the use of agro-industrial feed block as a feed supplement for grazing lambs. Production data were then subjected to partial budgeting for economical evaluation. The use of PMSG outperformed the control groups in fertility and net returns per ewe by US$ 8.36/ewe. The early weaning of lambs increased the net returns by US$ 3.90/lamb. The injection with vitamin $AD_3E$ showed an average additional net return of US$ 5.66/ewe. Feeding agriculture by-product blocks improved weight gain in the feed block groups and resulted in additional net returns of US$ 3.5/lamb. The economic viability and reproductive performance indicators demonstrate that efforts should be undertaken to disseminate these new practices in the development program.