• East Asian Economic Review
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• v.21 no.2
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• pp.147-165
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• 2017

This study quantifies the dynamic interrelationship between the KOSPI index return and search query data derived from the Naver DataLab. The empirical estimation using a bivariate GARCH model reveals that negative contemporaneous correlations between the stock return and the search frequency prevail during the sample period. Meanwhile, the search frequency has a negative association with the one-week- ahead stock return but not vice versa. In addition to identifying dynamic correlations, the paper also aims to serve as a test bed in which the existence of profitable trading strategies based on big data is explored. Specifically, the strategy interpreting the heightened investor attention as a negative signal for future returns appears to have been superior to the benchmark strategy in terms of the expected utility over wealth. This paper also demonstrates that the big data-based option trading strategy might be able to beat the market under certain conditions. These results highlight the possibility of big data as a potential source-which has been left largely untapped-for establishing profitable trading strategies as well as developing insights on stock market dynamics.

• 한국신재생에너지학회:학술대회논문집
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• 2006.11a
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• pp.213-216
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• 2006

풍력발전의 보급확대는 전력시장의 특성으로 인하여 국가적 차원의 정책에 의존될 수밖에 없는 태생적 한계를 지니고 있다. 역설적으로, 풍력발전은 정부기획에 의하여 시장조성(설계)이 가능하고, 따라서 풍력발전과 관련한 설비제조업, 발전사업 단지건설업 및 서비스업 등으로 구성되는 '풍력산업' 은 국가적 차원의 적정한 정책 수단으로 육성될 수 있는 새롭게 부상하는 산업부문이다 선진 외국의 전력시장에서 관찰되는 풍력산업의 출현 및 성숙과정을 참고로, 우리나라에서의 풍력발전의 보급확대를 위한 전략을 원론적 차원에서 모색하고자 하였다. 기술경영학적 관점에서 풍력산업의 육성도 결국 '기술주도'가 아닌 '시장주도에 의한 것이 효과적일 수밖에 없으며, 풍력발전의 보급확대를 통한 수요의 창출은 에너지믹스(Energy Mix)와 관련한 국가차원의 정책적 의지와 선택의 문제일 뿐이다

• Proceedings of the KIEE Conference
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• 2002.11b
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• pp.15-19
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• 2002

To provide a specified power quality under electric market system is becoming an important issue for customers and utility company. However, there is no realistic infra-structure to design a power system for the specified power quality. Present electric market is operating under the economic point of view. The low price could be attractive. but the effect of low price and low power quality for the long time should be considered for the system safety. This paper presents a model which conceptualize the dynamic power quality control mechanism to minimize total cost of a society which is affected electric power quality. This model aims to produce a basic infra-structure to balance cost and quality under the electric market system.

• New & Renewable Energy
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• v.2 no.4 s.8
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• pp.93-101
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• 2006

풍력발전의 보급확대는 전력시장의 특성으로 인하여 국가적 차원의 정책에 의존될 수 밖에 없는 태생적 한계를 지니고 있다. 역설적으로, 풍력발전은 정부기획에 의하여 시장조성(설계)이 가능하고, 따라서 풍력발전과 관련한 설비제조업, 발전사업, 단지 건설업 및 서비스업 등으로 구성되는 '풍력산업'은 국가적 차원의 적정한 정책 수단으로 육성될 수 있는 새롭게 부상하는 산업부문이다. 선진 외국의 전력시장에서 관찰되는 풍력산업의 출현 및 성숙과정을 참고로, 우리나라에서의 풍력발전의 보급확대를 위한 전략을 원론적 차원에서 모색하고자 하였다. 기술경영학적 관점에서 풍력산업의 육성도 결국 '기술주도'가 아닌 '시장주도'에 의한 것이 효과적일 수밖에 없으며, 풍력발전의 보급확대를 통한 수요의 창출은 에너지믹스(Energy Mix)와 관련한 국가차원의 정책적 의지와 선택의 문제일 뿐이다.

• Journal of the Chungcheong Mathematical Society
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• v.29 no.2
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• pp.329-336
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• 2016

The optimal portfolio choice problem with a stochastic income is considered in continuous-time framework. We provide a novel approach to treat the stochastic income when the market is complete. The developed method is useful to obtain closed-form solutions of the problems under borrowing constraints.

• Journal of Fashion Business
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• v.18 no.4
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• pp.97-113
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• 2014

This study investigates consumer's traits of market segmentation based on the apparel benefits. The subjects were 302 college students living in Yunnam, China. The mean, ANOVA, factor analysis, Duncan test, and K-means cluster analysis were used for statisticals analysis. The results of this study are as follows. The college students were classified, into six subdivisions, according to the apparel benefits by cluster analysis: indifference group, utility pursuit group, hedonic/brand pursuit group, individuality pursuit group, social recognition/fashion pursuit group, and pursuit benefits-minded group. In the factors of happiness-pursuing and life-centered of materialism, significant differences were found according to the groups of apparel benefits, and all factors of symbolic consumption and brand loyalty were found to have significant differences according to the groups of apparel benefits. The evaluation criteria of clothing were significantly different, depending on apparel benefits subdivision in criteria of aesthetic, socio-psychological, and utility. The use of information was shown to have significant differences, according to the groups of apparel benefits. The study results are highly expected to be utilized as useful sources in marketing plans for the midwest of China.

• Korean System Dynamics Review
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• v.5 no.1
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• pp.49-71
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• 2004

Demand-side Management can be defined as'any utility activity aimed at modifying customers' use of energy to produce desired changes in the utility's load shape'. Customers benefit by being able to control energy costs and improve quality of life and become more productive. Utilities benefit from DSM's value as a resource that enhances asset utilization and reduces both fuel costs and environmental emissions. The scope of DSM includes load management through rate schedules and conservation by improving energy effciency and using electricity consumption effectively. This paper study the DSM resource evaluation and customer behavior analysis todesign the DSM Program plan in response to customer needs. We develop basic system dynamics model to analysis the customer behavior based on a survey research. The DSM Program participants in the Hi- efficiency Inverter, Electric motor and efficient lighting applicancies operating by Conservation program 2002 become the survey objects. DSM resource evaluation evaluate firstt the distribution potentialities of each machine and then forecast the degree of diffusion. We apply the system dynamic approach to simulate the dynamic DSM market situation at the domestic beginning. This model will give the energy Planner the opportunity to create different scenarios for DSM program planning. Also it will lead to increased understanding of the dynamic DSM market

• Journal of the Korean Home Economics Association
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• v.44 no.2 s.216
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• pp.61-69
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• 2006

The purposes of this study were,1) to examine the clothing purchase behaviors of the elderly, and 2) to investigate the relationships of clothing purchase behaviors, information source, service quality and clothing buying motive, which may provide insights related to the silver market. Data were obtained for women in their 50's and 60's women living in Busan (N=285), and analyzed using to factor analysis, Cronbach's alpha, ANOVA and Duncan test. The research findings of the research wereare asan follows. The elderlys women bought clothes with their her friends, used credit cards, and usually shopped at the department stores. There were partly significant (Ed- it cannot be 'partly' either it was significant or it was not) differences in clothing purchase behaviors, information source, and service quality by clothing buying motive types. The ostentation group considered more massmideamass mediainformation sources and experience/salespersons/observation information sources, more was higher than the economic group and utility groups. The ostentation group and economical groups attached more importance to Facilities Service and Policy Service in service quality, was higher than the utility group. The Iimplications and drawn from the study results for the information will be useful to consumer behavior researchers and retailers of the silver market.

• Korean Management Science Review
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• v.32 no.3
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• pp.1-12
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• 2015

This study aims to analyze the efficiency of the government policy of Nanotechnology which is expected to minimize nanotechnology's potential risk, using the methodology of conjoint analysis and market share analysis. The attributes of conjoint analysis were divided into potential risk factor and the policy factor. It was found that the policy factor could alleviate the potential risk, subsequently increasing consumers' utility. Additionally, the government certification was more powerful than the mandatory labelling. The market share also increased in result of the nanotechnology-applied product with the certification or labeling either. The result of this study can be used as a reference to related policy makers in the fields of Nanotechnology.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.8
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• pp.1238-1247
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• 2022

The e-commerce market is growing faster as demand for non-face-to-face shopping increases due to COVID-19. These changes lead to the expansion of various opportunities for consumers, but companies are required to understand consumer characteristics and reflect them in their sales strategies so that they can be competitive in the market. This study examined how the perceived ease and utility of consumers affect the intention to use the platform according to the technology acceptance model (TAM). As a result, it was confirmed that the price competitiveness, awareness, and ease of use of the platform had a significant effect on the utility. In addition, it was confirmed that there was no moderating effect of user characteristics on the effect of ease of use on the platform intention. These results present important implications for a company's sales strategy, and in future studies, it is necessary to expand the study in consideration of more diverse variables.