• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.769-774
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• 2010

KTX Introduced in korea have occurred enhanced services and reduced regional travel time. "Induced traffic" is defined in the traffic demand generated in new project. 'Induced traffic' compared to the Diversion Demand Survey and research on ways to quantify the situation, insufficient analysis of constant and long-term observations are needed to estimate the changes in demand. In this study, Induced traffic effects due to the opening of KTX for analysis survey to passengers by Railway and the scale factor induced traffic review.

• 대한전기학회논문지:전력기술부문A
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• 제54권2호
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• pp.79-87
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• 2005

At present Cournot model is one of the most commonly used theories to analyze the gaming situation in oligopoly market. But there exist several problems to apply this model to electricity market. The representative one is to obtain the inverse demand curve able to be induced from the relationship between market price and demand response. In Cournot model, each player offers their generation quantity to accomplish maximum profit, which is accomplished by reducing their quantity compared with available total capacity. As stated above, to obtain the probable Cournot equilibrium to reflect real market situation, we have to induce the correct demand function first of all. Usually the correlation between price and demand appears on the long-term basis through the statistical data analysis (for example, regression analysis) or by investigating consumer utility functions of several consumer groups classified as residential, industrial, and commercial. However, the elasticity has a tendency to change continuously according to the total market demand size or the level of market price. Therefore it should be updated as trading period passes by. In this paper we propose a method for inducing and updating this price elasticity of demand function for more realistic market equilibrium.

• KIEE International Transactions on Power Engineering
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• 제5A권4호
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• pp.403-411
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• 2005

At present, the Cournot model is one of the most commonly used theories to analyze the gaming situation in an oligopoly type market. However, several problems exist in the successful application of this model to the electricity market. The representative one is obtaining the inverse demand curve able to be induced from the relationship between market price and demand response. In the Cournot model, each player offers their generation quantity to obtain maximum profit, which is accomplished by reducing their quantity compared with available total capacity. As stated above, to obtain the probable Cournot equilibrium to reflect the real market situation, we have to induce the correct demand function first of all. Usually the correlation between price and demand appears over the long-term through statistical data analysis (for example, regression analysis) or by investigating consumer utility functions of several consumer groups classified as residential, industrial, and commercial. However, the elasticity has a tendency to change continuously according to the total market demand size or the level of market price. Therefore it should be updated as the trading period passes by. In this paper we propose a method for inducing and updating this price elasticity of demand function for more realistic market equilibrium.

• 전기학회논문지
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• 제60권7호
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• pp.1339-1346
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• 2011

This paper is developed to demand management scenario of energy consumption efficiency improvement, electricity generation efficiency improvement, network efficiency improvement, change of distribution ratio, movement of energy source, change of heating system, put of CHP to quantitatively assess to impact on energy use of demand management at the national level. This scenario can be applied Energy System Management model was developed based on Energy Balance Flow. In addition, effect analysis through built demand management scenario was quantitatively evaluated integrated demand management effectiveness of energy cost saving, CO2 emission reduction and energy savings of national level by calculating to primary energy source usage change in terms of integration demand management effect more often than not a single energy source separated electricity, heat and gas.

• 수산경영론집
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• 제53권1호
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• pp.55-72
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• 2022

The domestic catch of squid is decreasing every year. Import volume is increasing to replace these domestic products. Import volume is expected to increase in the future, so it is necessary to study import substitution. Therefore, in this study, after selecting frozen squid, which accounts for the majority of imported squid, as the target fish species, China, Chile and Peru, which account for the majority of frozen squid imports, will be selected as the target countries for analysis. Then, the demand function of squid is estimated using the Rotterdam model, the inverse Rotterdam model, AIDS and inverse AIDS, which are the simultaneous equation demand types, and then elasticity is derived. After that, these models are compared in terms of significance, theoretical fit and practical fit.

• Environmental Engineering Research
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• 제16권1호
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• pp.19-27
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• 2011

This paper introduces an approach to identify the total energy consumption with subsequent $CO_2$ emissions, for both industrial and non-industrial sectors. Statistical data for 2005 were compiled in a national account system to construct an energy input-output table for investigating the influence between energy demand and supply activities. The methodological approach was applied to South Korea. Twelve types of energy and fifteen industrial and non-industrial sectors are formed as the compartments of the input-output table. The results provided quantitative details of the energy consumption and identified the significant contributions from each sector. An impact analysis on the $CO_2$ emissions for the demand side was also conducted for comparison with the supply side.

• 대한교통학회지
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• 제30권4호
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• pp.85-94
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• 2012

최근 화물운송은 물류비용절감뿐만 아니라 화물운송효율화, 녹색물류를 추구하고 있으며, 이를 지원하기 위한 방안으로 물류시설 경유 및 다수단간 복합운송을 지향하는 교통물류정책들이 활발히 논의되고 있다. 이러한 추세에 따라 관련 화물통행수요 분석 방안의 변화가 필요한 시점에 이르렀다. 그러나 국내에서는 화물통행수요모형 개발에 대한 논의가 미흡한 상황이며, 특히 중간경유지에서의 수단간 환적 등의 물류활동을 고려하고 있지 않아 물동량 추정의 신뢰성 및 현실성에 한계가 있다. 따라서 본 연구에서는 화물의 순물동량과 총물동량을 고려하여 복합수단교통망에서의 물류시설 경유여부 및 수단간 환적 등의 물류활동을 분석할 수 있는 화물통행수요분석 방안을 제시하였다. 또한 사례품목에 개발된 방법론을 적용함으로써 물류시설 신설 또는 변경에 따른 수단간 전환 효과를 분석에 본 방안의 적용가능성을 살펴보았다.

• 한국철도학회논문집
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• 제12권3호
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• pp.420-426
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• 2009

본 연구에서는 철도 투자에 따른 투자이후 수요변화를 계량화하기 위한 조사방법론을 검토하도록 한다. 특히, 유발수요는 전환수요에 비해 조사 및 계량화 방안에 대한 연구가 미흡하므로 유발수요를 중심으로 조사 및 계량화방법들을 검토하여 제시하도록 한다. 이러한 연구 결과는 국내에 철도에 대한 투자이후 단계에서 수요변화를 추정하는 연구가 미흡한 실정이므로 향후 활용도가 높을 것으로 판단된다.

• 수산경영론집
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• 제43권1호
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• pp.35-48
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• 2012

Inverse demand models are well established as market demands in theory and practice of the existing literature. However, the derivation and its interpretation of individual demands from the market demands are not well known in the literature. This paper analyzes the fish market in Korea by the inverse demand model and shows how we deduce the consumer's responses from the market responses when the markets determine the prices by the quantities demanded. It illustrates empirically how this can be done applying to the korean fish market data. The empirical results show that all fishes are price inflexible and mackerels and hairtails are scale flexible in the market demand while mackerels, hairtails, and croakers are price elastic and mackerels and hairtails are income inelastic in the individual demand. The methodology and empirics used in the paper will make a contribution to the existing literature especially for the purpose of recovering consumer's demand from the market demand, thus implementing the policies to administer the fish markets.

• Communications for Statistical Applications and Methods
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• 제17권5호
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• pp.697-712
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• 2010

이 연구의 목적은 우리나라 생명보험사들의 보험계약대출(약관대출) 수요에 대한 통계적 분석과 그 예측을 위한 확률모형을 개발하는 데 있다. 이를 위해, 먼저 대출 금리가 정책적 변화를 거친 1999~2008 기간 동안 우리나라 보험계약대출의 수요계열에 대한 추세, 주기성, 종속성 등 확률 및 통계적 특성을 파악하였다. 다음에, 교차상관분석을 통해 대출수요와 인과관계를 가질 수 있는 경제변수들과의 상호관련성을 밝히고, 특히 소비자 물가지수가 보험계약대출 수요를 선도하고 있음을 밝혔다. 마지막으로, 이러한 결과를 기초로 보험계약대출 수요의 예측을 위한 단변수모형 그리고 선도변수계열을 이용한 전이함수모형을 각각 완성하고 그 효과를 비교 평가하였다. 마지막으로 유도된 확률모형을 이용하여 보험계약대출 수요예측의 통계적 절차를 제안하였다.