• Proceedings of the Korean Statistical Society Conference
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• 2005.11a
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• pp.153-158
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• 2005

A floating-strike lookback call option gives the holder the right to buy at the lowest price of the underlying asset. Similarly, a floating-strike lookback put option gives the holder the right to sell at the highest price. This paper will derive explicit pricing formulas for these floating-strike lookback options with flexible monitoring periods. The monitoring periods of these options start at an arbitrary date and end at another arbitrary date before maturity.

• The Korean Journal of Applied Statistics
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• v.25 no.4
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• pp.543-552
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• 2012

Parrondo paradox is a counter-intuitive phenomenon where two losing games can be combined to win or two winning games can be combined to lose. When we trade stocks with a history-dependent Parrondo game rule (where we buy and sell stocks based on recent investment outcomes) we found Parrondo paradox in stock trading. Using stock data of the KRX from 2008 to 2010, we analyzed the Parrondo paradoxical cases in the Korean stock market.

• The Pure and Applied Mathematics
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• v.18 no.2
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• pp.129-139
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• 2011

We consider an optimal trading rule in this paper. We assume that the underlying asset follows a mean-reverting process and the transaction consists of one buying and one selling. To maximize the profit, we find price levels to buy low and to sell high. Associated HJB equations are used to formulate the value function. A verification theorem is provided for sufficient conditions. We conclude the paper with a numerical example.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10b
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• pp.320-322
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• 2000

본 논문에서 제안한 종합주가지수 "왼쪽어깨" 패턴 검출은 자기 연상 학습 신경망을 사용하였다. 종합주가 지수 데이터에서 머리어깨모형 중 왼쪽 어깨에 해당하는 데이터로 신경망을 학습시킨 후 이를 이용하여 현재 혹은 테스트 데이터를 입력으로 주어 성능을 평가하였다. 결과는 비교적 우수하였다. 패턴 검출에 의한 투자를 하였을 경우 17개월간의 누적 수익률이 132% 였다. 이 기간동안 buy and hold 전략을 사용했을 경우의 수익률은 39% 였다.률은 39% 였다.

• Proceedings of the KIEE Conference
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• 2004.11b
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• pp.143-146
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• 2004

This paper presents a method to improve reliability by dispersed generation (DG) installation considering load types and interruption cost. The objective functions such as power losses cost, operation cost of DGS, power buy cost and interruption cost are minimized for reliability improvement and efficient operation. The several indices for reliability evaluation are improved by dispersed generation system installation.

• Journal of Korean Society for Quality Management
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• v.14 no.2
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• pp.40-46
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• 1986

The decision maker has the job of torecasting capital investments and operating expenses to aid the decision making in choosing and evaluating present and future alternatives. The estimating function eventually analysis, evaluates and choose the alternatives. The analysis stemmed originally from a preliminary design of some sort, and eventually plans are started to investigate investment possibilites. This study provide the descounted cash flow and the present worth method. Despite any choice of an analytical method, there remains the problem of predicting certain future events. Therefore, these models dealing with optimum plant sizing, equipment replacement, and lease or buy will be discussed.

• Korean Journal of Agricultural Science
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• v.39 no.1
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• pp.151-159
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• 2012

This paper analyzes the consumers' preference for packaged apple and derives the measures to vitalize the distribution of packaged apple. To do this, survey was conducted for consumers in large cities, Seoul, Busan, and Daegu to observe their purchasing behavior and satisfaction both for packaged and unpackaged apple. Survey was focused to how they are satisfied with several attributes of package such as size, appearance, content, material, and label. On the basis of the survey results, the values of the package attributes were estimated. Survey results show that consumers tend to buy unpackaged apple rather than packaged apple. About 34 percent out of 313 respondents have ever purchased apple packed with paper box while only 10.5 percent have an experience to buy packaged apple with transparent box. Most respondents answered they preferred the package of five to six apples and 1.3 kilograms most. They preferred mid or large size apple. Estimation of the values of the package attributes using the conjoint analysis shows that consumers are giving the highest value to the price of packing material. It means that consumers are reluctant to the extra payment resulted from packing the apple. Therefore, the efforts to reduce the cost of packing apple should be made steadily. In order to vitalize the distribution of small packaged apple, the package should contain high quality apple with high sugar content, proper size, good appearance, and so on. And it needs to be promoted to the consumers that small packaged apple are not inferior to apple packed with paper box.

• Korean Journal of Cognitive Science
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• v.23 no.2
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• pp.205-224
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• 2012

How would people who buy an insurance policy respond to a low probability risk with a high future cost? Presented with a scenario describing a low probability accident of a chemical plant, participants in four experiments were asked to rate their perception of the risk and also their intention to buy an insurance of a given premium, an insurance, or a ratio insurance. Participants differently responded only to ratio insurance when rating their perception of risk, not to either premium or insurance. The pattern of results in four experiments converged to the conclusion that ratio insurance, an ecologically valid cue, makes people sensitive to the level of risk expressed in low probabilities of an accident. Our results were consistent with the prediction generated by the ecological cue hypothesis which empathizes the importance of frequency over probability in risk perception (Gigerenzer, 2000).

• Fashion & Textile Research Journal
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• v.16 no.6
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• pp.879-887
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• 2014

Consumers often act impulsively when making internet purchases. Triggered by easy access to products, lack of social pressure, and absence of delivery impediments, impulse buying frequently occurs in the context of internet shopping. This study tests the structural equation model of the impulse buying process for fashion products when internet shopping and examines impulse buying process differences between Korean and Chinese consumers. A total of 985 usable questionnaires were obtained from college students. Data were analyzed by structural equation model analysis using a correlation matrix with a maximum likelihood by AMOS 21.0. Results showed that increased internet browsing by consumers resulted in more impulse buying as mediated by the urge to buy; in addition, more impulse buying by consumers resulted in a higher consumer satisfaction experience. Pure impulse buying created more important antecedents of satisfaction than the promotion-oriented impulse buying. Impulse buying showed a high similarity between Korean and Chinese consumers; however, increased influence from promotion activities resulted in more fashion product impulse buying for Chinese consumers versus Korean consumers. We confirm that one of the outcomes of the impulse buying process is impulse buying product satisfaction. Korean and Chinese consumers also present similarities and differences in fashion product impulse buying. A managerial implication is discussed for retailers of fashion products to develop strategies to increase consumer browsing and subsequently trigger impulse buying accompanied with consumer satisfaction.

• The Research Journal of the Costume Culture
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• v.19 no.6
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• pp.1372-1384
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• 2011

The purpose of this study was to identify egonomy tendency on their self-makeup and appearance management behavior of university women in Jeonbuk province. A self-administered questionnaire was used for data collection. Frequency analyses, reliability analyses, cross-tabulations and multiple regression analyses were used. Factors of university women's egonomy tendency were individuality, value, luxury good, style, design, appearance, and economic feasibility. University women were classified into the egonomy retarde group(G1), the value pursuing group(G2), the economic feasibility pursuing group(G3), and the highly egonomy pursuing group(G4). G1 were indifferent to their makeup methods and appearance management, had the least experience in buying recommended cosmetics or idea cosmetics. G2 invested time and efforts in makeup and managed their appearance with cosmetics or folk remedies, had less experience in buying artist brand cosmetics. G3 performed makeup frequently, were not much interested in appearances while showing the most frequent appearance management behaviors using cosmetics of folk remedies, and spent small amount of money to buy cosmetics. G4 showed high frequencies of all factors of self-makeup and appearance management behaviors, had the most experience in buying artist brand cosmetics and spent much amounts of money to buy cosmetics. Self-makeup behavior was affected by their tendencies to pursue individuality, values, appearance and appearance management behavior was affected by their tendencies to pursue luxury goods, appearance, and economic feasibility.