• 기술혁신학회지
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• 제4권3호
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• pp.355-368
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• 2001

The importance of software industry is rapidly increasing with the growth of Internet and the advent of digital economy. The purpose of this study is to research the impact of the copyright protection for securing producers and enhancing of producing on social welfare. The Korean government reformed the copyright law to enhance the copyright protection in 2000 and intensely controlled software piracy in 2001. However, copyright protection has much controversy in aspects of hindering social use of software. This study compared and analyzed the general equilibrium and the copyright protection for social welfare maximization in two cases when network externality exists or not, by assuming the simple demand and supply functions.

• 한국IT서비스학회:학술대회논문집
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• 한국IT서비스학회 2006년도 추계학술대회
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• pp.261-270
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• 2006

본 논문의 플랫폼이라는 자산의 관계특이성으로 인한 한국형 무선인터넷 플랫폼인 WIPI가 도입되기 이전에는 단말기제조사가 아닌 이동통신 3사가 주체가 되어 서로 다른 무선인터넷 플랫폼을 개발${\cdot}$사용하는 것이 균형이었으나, 정부가 주체가 되어 WIPI를 도입한 이후에는 표준화로 인한 이동통신사의 비용감소 및 호환성 효과가 전유성(專有性) 효과를 상쇄할 때에만 WIPI 사용이 바람직한 사회적 균형으로 달성된다는 것을 보여주었다. 즉, 사회적 균형이 정책에 의해 동일한 플랫폼(WIPI)으로 옮겨졌을 때에는 이동통신사의 투자유인이 감소할 수 있으며, 이로 인한 시장실패가 발생할 수 있으므로 이에 대한 정책대안이 요구된다는 것을 알 수 있었다.

• 문화기술의 융합
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• 제9권6호
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• pp.779-787
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• 2023

예산 분석에 관한 기존 연구는 이론적 배경 없이 전체 예산 대비 국방예산의 연간 변화만을 기술하는 데 대부분 국한되어 왔다. 본 연구에서는 단절균형이론(Punctuated Equilibrium Theory, PET)을 이용하여 국방비 지출에 대한 실증분석을 실시하였다. 본 연구의 목적은 한국의 국방예산(총예산, 전력운용예산, 방위력개선예산)의 추이를 살펴보고, 단절균형이론을 사용하여 국방예산의 급진적 변화 지점을 파악하고 분석하는 것이다. 본 연구에서는 또한 1998년부터 2017년까지 매년 대한민국 국방예산 자료를 활용하여 국방예산의 추세와 급격한 변화 지점을 탐색하였다. 그 결과, 1998년부터 2017년까지 한국의 국방비 지출 패턴은 다음과 같은 특징을 갖는 것으로 나타났다. 국방예산 총액 기준 19년간 안정적인 성장을 보였고 일회성 단절지점(5.0%)을 보였으며, 전력운영비는 18년 동안은 균형을 이루며 안정적으로 성장하였고 두 번의 단절지점(10%)을 보였다. 방위력개선비는 총 5번의 급격하게 변화는 단절지점을 확인할 수 있었다.

• 아동학회지
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• 제38권1호
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• pp.49-62
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• 2017

Objective: The purpose of this study was to examine the main and interaction effects of mothers' parental internal attributions and neuroticism on self-perception of the parental role. Methods: A total of 138 mothers with toddlers in Seoul and other big cities in Korea completed questionnaires, and data were analyzed by Pearson's correlation and multiple regression analyses. Results: The results were as follows: First, mothers who attributed their successful parenting to ability showed lower satisfaction, and mothers who attributed their successful parenting to ability and effort showed higher feelings of equilibrium. Mothers with higher levels of neuroticism showed higher competence, parental investment, and satisfaction in their self-perception of the parental role. Second, there were significant interaction effects between ability attribution and neuroticism on feelings of equilibrium, between effort attribution and neuroticism on feelings of equilibrium, between ability attribution and neuroticism on competence, and between effort attribution and neuroticism on parenting investment. Conclusion: The findings of this research indicate that neuroticism showed a positive effect on self-perception of the parental role because neuroticism indicates sensitivity in parenting. Further, the effects of neuroticism on self-perception of the parental role differed by mothers internal attribution.

• 수산경영론집
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• 제48권2호
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• pp.1-17
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• 2017

This work studies the variability of flatfish sales revenue. The theoretical analysis draws functions for equilibrium price and quantity using expectation hypotheses. The functions include unpredictable phenomenon with dummy variable and GARCH. The equilibrium function, using adaptive expectation hypothesis, contains the independent variables of supply and demand, while the equilibrium function, embodying rational expectation hypothesis, includes only the independent variables of supply side, because the demand side disappears by the information extraction process theoretically, if economic subjects build the expectation rational. The empirical analysis shows: the variability of flatfish production has a spillover effect on the variability of revenue with the adaptive expectation hypothesis. In the case when the model has a rational expectation hypothesis, the variability of flatfish production has a spillover effect on the revenue (the mean equation of GARCH model). This study indicates that there is the variability in flatfish production and sales revenue, and the spillover effect between them. The result can help to build of the rational system for the fishery income stability.

• 사회경제평론
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• 제38호
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• pp.51-83
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• 2012

다수의 상품이 생산되는 경제에서 스라파(Sraffa) 균형가격 조건과 균제성장 및 상품시장 균형 조건이 성립하는 경우를 생각하자. 이 모형에서 임금율 결정식과 투자함수를 동시에 부여하면 전체 경제는 과잉결정 되며 균형이 존재하지 않는다. 본 연구는 이 과잉결정 현상을 불균형 상태로 해석하고, 불균형상태에서 실현되는 임금율과 자본축적률이 각각의 동학식을 따라 결정되는 것으로 해석한다. 그리고 이 해석의 유효성을 주장하기 위하여 전체 경제에 대한 단순한 동학모형을 구축하고, 임금율과 자본축적률의 동학경로를 분석한다. 본 연구의 동학모형은 로카-볼테라 식체계의 구성조건을 만족하며, 따라서 전체 경제의 성장경로는 내생적으로 순환변동하는 경로를 따라 결정된다.

• 전기학회논문지
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• 제56권7호
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• pp.1199-1204
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• 2007

In a cost based pool market, the generation capacity can be used as strategic bids by generation companies (Gencos) with the cost functions open to the market. Competition using strategic capacities is modeled by Cournot and Perfect Competiton (PC) model, and transformed into two by two payoff matrix game with Gencos' decision variables of Cournot and PC model. The payoff matrices vary when capacity payments are given to Gencos in accordance with their capacity bids. Nash Equilibrium (NE) in the matrices also moves with capacity price changes. In order to maximize social welfare of the market, NE should locate in a certain position of the payoff matrices, which corresponds to a PC NE. A concept of a critical capacity price is proposed and calculated in this paper that is defined as a minimum capacity price leading to PC NE. The critical capacity price is verified to work as a tool for suppressing a strategic capacity withholding in simulations of a test system.

• 대한전기학회논문지:전력기술부문A
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• 제53권1호
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• pp.67-72
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• 2004

This paper addresses the bidding strategies of generating firms in a competitive market where the firms are provided with payment for generating reactive power. Reactive support for voltage control is an integral and critical part of power system operations. Since reactive support is unbundled in a competitive market under open access transmission, it is treated as one of ancillary services. The operation costs and opportunity costs for reactive support are compensated by payment to the firms, hence their bidding strategies will be affected. The opportunity costs are evaluated from the foregone profits of a generator in making sales in real power market by providing reactive support instead of real power. Game theory approach is used to analysis the transaction strategies of real power by the bimatrix method in this paper. Through computing the Nash equilibrium in a sample system, an incentive of a generator for improving the reactive generating capacity is found to be effective and the variations of the profits are analyzed as the demand power factor changes.

• 한국경영과학회지
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• 제7권1호
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• pp.31-43
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• 1982

A general equilibrium growth model is constructed to analyse the income distributional impacts of the 1973 world oil crisis upon the Korean economy. Our results show that all consumer groups experienced a virtually uniform percentage reduction in their income levels. This implies that a lower income groups may be more damaged in a relative sense. In any rate, there were no domestic groups who benefit from the international oil crisis. This model could be used to figure out which social group will be most vulnerable against the next possible oil crisis we may expect in the future. Our result nay provide us a guideline for a compensating program to protect such groups against an external shock.

• 대한전기학회논문지:전력기술부문A
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• 제52권10호
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• pp.616-623
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• 2003

Competition among electric generation companies is a major goal of restructuring in the electricity industry, The trading system in an electricity market has been one of the most important issues in deregulated electricity market. This paper deals with comparisons of the major two types of the trading system: compulsory pool market and bilateral contract market. The two trading systems are compared quantitatively from the viewpoint of consumer's surplus and social welfare, This paper, also, proposes a unified model of Cournot and Bertrand for analyzing the mixed trading system of pool market and bilateral contract market. Nash equilibrium of the unified model is derived by criteria for participating in bilateral contract market. Numerical results from a sample case show that a mixed trading system of pool market and price-competitive bilateral market is beneficial to consumer from the view points of consumer's surplus.