• Environmental and Resource Economics Review
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• v.21 no.1
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• pp.3-25
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• 2012

Generally speaking, firms, faced with a regulatory environment, are likely to use more or less inputs than optimal level due to allocative inefficiency of inputs. This paper, first, tests allocative efficiency of fuel inputs and calculates the divergence between the actual and optimal levels of each fuel input conditional on the optimal level of capital stock in Korean thermal power industry. Then, given that each fuel is efficiently allocated. potential reduction of $CO_2$ is estimated over the period 1987~2008. The null hypothesis of allocative efficiency with respect to all fuels is rejected, indicating that thermal power plants fail to attain cost minimization subject do market prices. Allocative efficiency between each pair of fuels is also tested; efficient uses of fuels relative to each other are all rejected. Empirical results indicate that coal and gas are used more and oil is used less than optimal level. On average, more than 10 million tons of $CO_2$ per year could be reduced by achieving allocative efficiency of fuels.

• Environmental and Resource Economics Review
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• v.23 no.1
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• pp.43-65
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• 2014

In this paper, we test for allocative efficiency of productive inputs including electricity and measure the divergence between the actual and optimal level of electricity for the chemical products, which is a relatively highly electricity-intensive sector in Korean manufacturing industries, by estimating a shadow cost function. Supposing cost minimization subject to market prices was achieved, we derive the price elasticities of demand for each input and simulate the impact of a 10% increase in power rate on its demand and supply price by estimating jointly a cost function with an inverse supply relation. The null hypothesis of allocative efficiency of inputs is rejected over the period 1982-2006. On average, electricity is used more than optimal level by 98% per year. The demand for electricity decreases by 11.4%, and supply price, on average, falls by 0.08%, other things being equal.

• Journal of the Korean Recycled Construction Resources Institute
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• v.9 no.3
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• pp.253-259
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• 2021

Plastic wastes generated from household waste are separated by mixed discharge with foreign substances, and recycling is relatively low. In this study, the effect of the ratio and content of mixed plastic waste coarse aggregate(MPWCA)s and mixed plastic waste fine aggregate(MPWFA)s filled with blast furnace slag fine powder on the slump and compressive strength of concrete was evaluated experimentally. The MPWCAs were found to have a similar fineness modulus, but have a single particle size distribution with a smaller particle size compared to coarse aggregates. However, the MPWFAs were found to have a single particle size distribution with a larger fineness modulus and particle size compared to fine aggregates. Meanwhile, the effect of improving the density and filling pores by the blast furnace slag fine power was found to be greater in the MPWFA compared to the MPWCA. As the amount of the mixed plastic waste aggregate(MPWA)s increased, the slump and compressive strength of concrete decreased. In particular, the lower the slump and compressive strength of concrete was found to decrease the greater the amount of MPWFA than MPWCA when the amount of MPWA was the same. This is because of the entrapped air and voids formed under the angular- and ROD-shaped aggregates among the MPWFAs. On the other hand, the addition of the admixture and the increase in the unit amount of cement were found to be effective in improving the compressive strength of the concrete with MPWAs.

• Journal of the Korean Regional Science Association
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• v.34 no.2
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• pp.3-19
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• 2018

The objective of this study is to observe the efficiency of clinical performance on the supply and demand of medical resources in Korea. For the empirical analysis, we constructed the dataset on age standardized mortality rate, the number of physician, specialist, surgery, medical institution, ratio of general hospitals of 16 provinces in Korea from 2006 to 2013. The panel probability frontier model is employed as an analysis method and considered heteroscedasticity and autocorrelation of the error in panel data. In addition, the demographic and socioeconomic characteristics of the 16 provinces, unemployment rate, elderly population ratio, GRDP per capita, and ratio of hospitals in comparison to the general hospitals are used to find the effect on the technical efficiency of clinical performance on supply and demand of medical resources. The results are as follows. First, for the clinical performance, the supply side of human resources such as doctors and specialists and the demand side factors such as chronic illness clinic per unit population have a significant influence, respectively. Second, the technical efficiency of clinical performance on the supply and demand of medical resources of each input component was 59-70% in terms of clinical efficiency in each region. Third. estimates of technical efficiency of inputs that affect clinical performance showed a slight increase in all regions during the analysis period, but the increase trend decreased slightly. Fourth, the ratio of the elderly population and GRDP per capita have a positive influence on the technical efficiency of clinical performance on the supply and demand of medical resources. The difference of each efficiency by region is due to the regional differences of the input medical resources and the combination of them and the demographic and socioeconomic characteristics of the region. It is understood that the differences in technological efficiency due to the complexity of supply and demand of medical resources, demographic structure and economic difference affecting clinical performance by region are different.

• Korea journal of population studies
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• v.32 no.3
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• pp.173-199
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• 2009

여성주의 경제학자와 사회학자들은 부모의 아동양육시간이 여성과 아동의 경제적 복지에 미치는 중요한 함의에 대해 강조해왔다. 사회가 가족이 아동을 양육하는데 더 큰 지원을 제공해야 한다는 부모의 목소리가 커지고 있지만, 정작 어느 정도의 시간 자원이 아동을 양육하는데 투입되는지에 관해 연구된 바가 거의 없다. 기존의 연구들은 전체 생산 경제에서의 무급 노동의 경제적 가치의 비중에 초점을 두었다. 본 연구는 2004년 한국생활시간조사를 사용해 아동 양육에 투입된 부모의 시간을 추정하고 그 시간의 금전적 가치를 추정하는 것이 목적이다. 부모가 아동양육을 위해 투입한 시간의 경제적 가치는 시장 노동을 통해 벌어들인 소득에 비교해 볼 때 상당한 비중을 차지하고 있다. 아동이 소비하는 재화와 서비스를 생산하는 데 있어 무급 노동의 역할은 시장 노동에 참여하지 않고 있는 사람들에게 특히 중요하다. 아동을 양육하는 모의 노력은 대개 무급 노동의 형태를 띠고 있는데, 부모의 시장노동만큼이나 아동 복지를 향상시키는데 기여하고 있다. 전체 경제 차원에서의 무급 노동의 비중과 그 경제적 가치에 대한 연구 성과들과 별개로, 부모의 아동 양육 시간의 비중과 경제적 가치의 추정은 전체 경제 가운데 인적 자본부문에 대한 무급 노동의 경제적 역할에 대해 중요한 정보를 제공한다.

• 한국IT서비스학회:학술대회논문집
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• 2003.05a
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• pp.411-419
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• 2003

ERP 도입 및 운영과정에 전사적 자원 즉 인적자원과 물적자원이 투입되고 활용되었다. 기업경영에 있어서 제 자원의 관리가 중요하고, 특히 인적자원이 성과에 중요한 영향을 미치고 있다. 그 동안 ERP 도입요인과 도입성과에 대한 기존의 연구는 중소기업을 포함한 전체 기업을 대상으로 한 연구가 대부분이었으며, 그러한 연구의 대부분은 먼저 ERP을 도입한 대기업 위주의 연구였다고 볼 수 있다. 중소제조기업의 ERP 도입요인으로서 열악한 전사적 자원의 수준이 ERP 도입성과 즉 생산효율성에 영향을 미친다는 전제하에 이들 간의 인과관계를 위한 연구모형을 제시하였다.

• Resources Recycling
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• v.29 no.3
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• pp.24-35
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• 2020

Management of resource productivity is important for the reduction of natural resources and energy consumption. This is closely linked to circular economy which has recently been stressed worldwidely. Resource productivity is a key indicator which is to be managed in various industry sectors. Especially Korea which is heavily dependent on the natural resources import from overseas needs to give attention to this point. Nevertheless resource productivity related domestic researches and policies are extremely rare. This paper thus presents trends on resources productivities and their management policies of European countries and OECD G7 countries compared to the situation of Korea. In addition, the decoupling phenomenon of DMC (domestic material consumption) and GDP of Europe is analyzed and the resource productivity promotion strategy of Korea is proposed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.1
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• pp.138-148
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• 2021

This study explores the factors that moderate the impact of competitive strategy on resource sharing in order to explain why existing empirical research has not shown statistically significant results. We test the hypothesis that competitive strategy pursuing low-cost rather than differentiation increases resource sharing and analyze how the relationship between competitive strategy and resource sharing changes when diversification, interconnectedness, centralization of authority, and resource level are entered into the equation as moderating variables. According to the results, competitive strategy doesn't affect resource sharing alone, but it has significant effects on resource sharing when it is combined with interconnectedness, centralization of authority, and resource level, except for diversification. This means that low-cost strategy increases resource sharing under the conditions of high interconnectedness, more centralized authority, and low resource level. The prior discussions have focused on the willingness or intentions of resource sharing without considering the abilities or possibilities. Our findings indicate that resource sharing could be better predicted by using moderating variables reflecting the abilities or possibilities. The contribution of the study is that we discover and complement the vulnerability in the logic of resource sharing.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1999.07a
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• pp.124-129
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• 1999

지난 몇 십년간 생물계 폐기물 호기성 처리의 경제적이고 실용적인 공법으로 가축분뇨처리에 적용되어온 유기성 폐자원의 호기성 분해공정은 축산환경 보전, 지력증강 자원의 고갈 및 지구온난화문제 등에 의해서 더욱 주목받아 오고 있다. 특히, 기존의 호기성 고형폐기물 처리시설에서 저투입, 고효율의 처리시설을 개발하여 보다 많은 숙성퇴비를 얻을 수 있는 통기퇴적식 퇴비화 시설은 강제통풍 통기방식으로 호기성 미생물의 분해시간을 단축하고 암모니아가스 휘산을 저감하는 등의 탁월한 처리효율을 나타내었다(Brinton et al., 1995). (중략)

• Environmental and Resource Economics Review
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• v.7 no.1
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• pp.151-164
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• 1997

물부족현상을 해결하기 위해서는 장기적인 공급기반시설의 확충과 함께 여러 형태의 경제적 유인제도의 활용을 통한 수요관리정책을 병행함으로써 물의 절약효과를 최대화시키는 것이 바람직하다. 본 연구에서는 1993년 한국 제조업을 대상으로 시장구조적, 환경적 제약여건하에서 공업용수의 비효율적인 사용실태를 알아보고 적정수준의 용수수요량을 유도하기 위하여 용수가격의 인상을 추진할 경우, 이에 필요한 가격인상율을 제시한다. 방법론적으로는 적정수준의 자본투입을 가정한 제약일반비용함수를 추정한다. 추정결과, 공업용수는 적정수준에 비해 무려 평균 50배 이상 과다하게 사용되고 있으며 1993년 현재의 용수가격을 106.8% 인상시켜야 적정수준으로 유도할 수 있는 것으로 나타났다.