• Asia pacific journal of information systems
• /
• 제31권3호
• /
• pp.257-276
• /
• 2021

This study investigates the factors that facilitate or hinder people to use mobile payment, especially drawing upon the theoretical perspectives on individual's privacy protection motivation and perceived market condition. Survey data (n = 200) were collected through a web-based platform and used to test a theoretical model. The results show that one's privacy protection power is formed by various individual and technological factors (i.e., perceived data exposure, self-efficacy, and response efficacy), and in turn it determines his/her intention to use mobile payment. Moreover, the relationship between privacy protection power and mobile payment use is conditional on the perceived market control by the service provider - with a perception of the high level of provider's market control, one uses mobile payment regardless of his/her privacy protection power, while under the low level of provider's market control, the decision depends on the degree of privacy protection power. The findings would help our understanding of why some people are more susceptible to mobile payment and others are not.

• Management Science and Financial Engineering
• /
• 제19권1호
• /
• pp.43-47
• /
• 2013

We investigate the effect of bank's market power on financing constraints of non-financial firms in 11 Asian countries between 1995 and 2009. Using firm-level data we analyze financial constraints with the Euler equation derived from the dynamic investment model. We find that with a highly concentrated banking sector firms which have high market power are less financially constrained. These results are consistent with an information-based hypothesis that more market power increases bank's advantage to produce information on potential borrowers.

• 대한전기학회논문지:전력기술부문A
• /
• 제52권5호
• /
• pp.287-293
• /
• 2003

The deregulation and structural reform of power markets have started from the early 90s, which has brought about new studies on the new environment. Regardless the market structure, however, power systems need to be operated and planned in a stable and reliable manner. Therefore, decisions on proper amount of operating reserves and their reliable operations are very important. Up to now, the decision processes of operating reserves depend mainly on experiences of operators in Korea. When Korean power market comes under private management, operating reserves would influence power rate as well as power Quality, Therefore, it is time to prepare reasonable operating reserve standards in a systematic way for the new environment. This study suggests the proper operating reserve standards considering rules of the power market in Korea. To verify the adequacy of the proposed standards, stability and frequency characteristics of the Korean power system are analyzed as well.

• Journal of applied mathematics & informatics
• /
• 제26권1_2호
• /
• pp.337-347
• /
• 2008

Based on social welfare maximum theory, the optimal scale of power plants entering generation power market being is researched. A static non-cooperative game model for short-term optimization of power plants with different cost is presented. And the equilibrium solutions and the total social welfare are obtained. According to principle of maximum social welfare selection, the optimization model is solved, optimal number of power plants entering the market is determined. The optimization results can not only increase the customer surplus and improve power production efficiency, but also sustain normal profits of power plants and scale economy of power production, and the waste of resource can also be avoided. At last, case results show that the proposed model is efficient.

• 국제지역연구
• /
• 제14권1호
• /
• pp.99-119
• /
• 2010

본 연구는 미국의 천연가스시장과 석유시장, 그리고 유럽의 석유시장을 대상으로 두가지 분석에 주안점을 두었다. 하나는 그랜저 인과관계(Granger-causality) 검증을 통하여 수익률과 변동성 부문에 있어 이질적 상품시장간 또는 동일상품시장내 현/선물간 예측력(predictive power) 여부 확인이며, 다른 하나는 회귀분석을 통한 선물가격의 현물가격 안정화 효과이다. 상품시장간 예측력에서 수익률 부문은 현물수익률과 선물수익률이 서로 상반된 양상을 보였지만 전체적으로 통계적 유의성이 낮게 나타났다. 변동성 부문에서는 석유시장이 천연가스시장에 가지는 예측력과는 달리 천연가스시장은 석유시장에 별다른 영향을 주지 못하는 것을 확인 할 수 있었다. 동일상품시장내 예측력 분석의 수익률 부문에서는 유일하게 유럽 석유시장의 현물수익률이 선물수익률에 예측정보를 가짐을 알 수 있었다. 변동성 부문은 모든 상품시장에서 현물과 선물간 인과관계가 양방향으로 성립함을 확인하였다. 선물가격의 현물가격 안정화 효과 분석 결과, 선물변동성은 현물변동성을 증가시키는 것으로 나타났다.

• 대한전기학회논문지:전력기술부문A
• /
• 제50권12호
• /
• pp.549-555
• /
• 2001

Due to the development of information technology, the operating power systems under the deregulated environment has the advantages of a introduction of the market function, a competition in sales and purchases of Power, as well as the difficulty of maintaining reliability on the same or high level with it in a monopolistic market. This paper presents a basic scheme of the congestion management in the Korea electricity market under the deregulated environment. We investigated some cases of the congestion management in the world and the effects of the congestion management in the power systems. A basic idea of the congestion management in the Korea is presented based on the analysis of transmission congestion management in the competitive electricity market.

• 한국시스템다이내믹스연구
• /
• 제6권2호
• /
• pp.25-35
• /
• 2005

This paper describes the mechanism for new investment to appear in waves of boom and bust causing alternative periods of over and under supply of electricity in Korean market. A system dynamics model was developed to describe the dynamic behavior of new investment in Korean market. The simulation results show the boom and bust cycle in the new investments. When the market price is high, investors decide to build new power plants. However, it takes some delay time to complete new power plants. When the new power plants are being added into the grid, the supply increases and the wholesale price begins to decrease. This causes the cancellation of new power plant or delay the construction. This mechanism causes the boom and bust cycle in new investment.

• 전기학회논문지
• /
• 제56권6호
• /
• pp.1017-1022
• /
• 2007

In this paper, we try to analyze the likelihood of exercising the power of market dominance by certain generators in future power industry of Korea. Firstly, we estimated installed generation capacity and sales volume of electricity in Korea, based on 'The 3rd Long Term Power Plan' which was announced in December 2006. Secondly, we calculated HHI, an index showing the degree of concentration of an industry, and RSI, an index showing how adequate the supply of goods or services of an industry is, using Fast-Forward. Thirdly, assuming a major generator employs the strategy of withholding a part of its available capacity at a peak time, we simulated hypothetical movement of SMP over a certain period of time, which is compared with that obtained without assuming such strategy to generate Lerner Index. an index showing the degree of market power of a monopoly. Regulators, home and abroad, have not given much interest in analyzing the effect of market dominance that is likely to be exercised by certain players in the future. That said, this paper provides insight into developing methodologies of analyzing and mitigating such effect by proposing the above indices to gauge it. In addition, this paper also shows the potential impact of employing capacity withholding strategy on the financial account of a dominant generator.

• 에너지공학
• /
• 제15권4호
• /
• pp.256-276
• /
• 2006

경쟁적 전력시장에서, 송전혼잡은 지역적 시장지배력의 핵심 요인들 중 하나이다. 재무적 송전권을 구매한 시장 참여자는 그들이 지불한 혼잡 세를 돌려받음으로써 재무적 보호를 받을 수 있다. 하지만 많은 연구에서, 이러한 송전권이 오히려 시장지배력을 강화시킴을 보였다. 따라서 본 논문은 새로운 개념의 송전권인 Contingent Transmission Rights을 이용해 지역적 시장지배력을 완화시키는 것이 목적이다. 본 논문은 각 모선의 한계가격 (Locational Marginal Pricing LMP)을 기반으로 한 모선별 가격제도(Nodal Pricing)와 최적조류계산(Optimal Power Flow)를 이용해 사례연구를 수행하였다.

• 유통과학연구
• /
• 제15권11호
• /
• pp.73-82
• /
• 2017

Purpose - This paper aims to investigate a profit maximizing incentive of foreign traders in distributing the KOSPI 200 Futures. Such an incentive may induce unsophisticated retail traders to suffer loss from speculative trading. Since Korean government increased the entry barriers of the market to protect unsophisticated traders, the market size has been decreasing while the proportion of the contract held by foreign traders has been increasing. These on going changes make the market imperfectly competitive, where a profit maximization incentives of foreign traders are expected to grow. In this paper, we attempt to find any evidence of such behavior, thereby providing implications regarding market policy and market efficiency. Research design, data, and methodology - According to Kyle(1985), an informed trader exploits his/her monopoly power optimally in a dynamic context so that he/she makes positive profit, where he/she could conceal his/her trading utilizing noise trading as camouflage. We apply the KOSPI 200 Futures market to the Kyle's model: foreign traders who take into account the effect of his/her trading to maximize expected profits as an informed trader, retail investors as noise traders, and financial institutions as market makers. To find any evidence of monopolistic behavior, we test the variants of trading volume and price data of the KOSPI 200 Futures over the period of 2009 and 2017. Results - First, we find that the price of the KOSPI 200 Futures are more volatile than the price of underlying asset. Second, we find that monopolistic foreign trader's trading order flows are consistent with exploiting his/her monopoly power to maximize profit. Finally, we find that retail investors' trading order flows are inversely consistent with maximizing profit, that is, uninformed retail investors suffer loss continuously in speculative trading against informed traders. Conclusions - Our results show that the quantity of strategic order flows may have a large effect on the price, therefore, resulting the market inefficiency. The results also imply that, in implementing regulations, the depth of the market must be considered to maintain market liquidity, and suggesting interesting research topics regarding the market structure.