• Information Systems Review
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• v.4 no.2
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• pp.133-153
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• 2002

Internet lowers the search cost to acquire information about products and sellers price information. Because consumers can easily compare prices among different Internet retailers, the price competition among merchants in Internet has been intensified. For online retailers, it is important to differentiate their sites from competitors based upon services rather than prices. This study investigates which factors influence on consumers price sensitivity in Internet book markets and examines whether consumers price sensitivity has any effect on the type of preferred Internet bookstore (hybrid or pure online book stores). Survey is conducted to empirically investigate the relationship among the various consumer attitudes and price sensitivity. The result shows that price search and price importance have effect on the choice of Internet bookstore. Consumers with higher price sensitivity preferred to purchase books from pure Internet bookstores rather than hybrid (click-and-mortar) bookstores. This study provides an exploratory framework that tries to understand consumer behavior about price sensitivity that might provide some marketing implications to lessen the price competition of Internet retailers.

• Land and Housing Review
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• v.4 no.1
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• pp.43-54
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• 2013

This This paper investigates the variation of the factors to determinate housing price in Seoul metropolitan area after sub-prime financial crisis, in Korea, using a VAR model. The model includes housing price and housing rent (Jeonse) in Seoul metropolitan area from 1999 to 2011, and uses interest rate, real GDP, KOSPI, Producer Price Index and practices to impulse response and variance decomposition analysis to grasp the dynamic relation between a variable of macro economy and and a variable of housing price. Data is classified to 2 groups before and after the 3rd quater of 2008, when sub-prime crisis occurred; one is from the 1st quater of 1999 to the 3rd quater of 2008, and the other is from the 2nd quater of 1999 and the 4th quater of 2011. As a result, comparing before and after sub-prime crisis, housing price is more influenced by its own variation or Jeonse price's variation instead of interest rate and KOSPI. Both before and after sub-prime financial crisis, Jeonse price is also influenced by its own variation and housing price. While after sub-prime financial crisis, influences of Producer Price Index, KOSPI and interest rate were weakened, influence of real GDP is expanded. As housing price and housing rent are more influenced by real economy factors such as GDP, its own variation than before sub-prime financial crisis, the recent trend that the house prices is declined is difficult to be converted, considering domestic economic recession and uncertainty, continued by Europe financial crisis. In the future to activate the housing business, it ia necessary to promote purchasing power rather than relaxation of financial and supply regulation.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.05a
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• pp.123-124
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• 2013

비용대비 작업 처리의 효율을 위해서는 사용자들의 작업 요구사항에 적절한 자원을 선택하고 요구 작업을 적절한 할당된 자원에 스케쥴링하는 플랫폼이 필수적이다. 또한 이러한 플랫폼은 사용자의 SLA 에 따라 작업 처리 기한 안에 요구 비용 이내로 작업을 처리할 수 있도록 결정을 내릴 수 있어야 하고 요구 작업량의 변화에 따라 즉각 대응을 하기 위하여 실시간적인 결정을 내릴 수 있어야 한다. 이러한 복잡한 결정 사항들을 최적 판단으로 대신 처리해주는 미들웨어로 클라우드 자원 브로커 시스템을 사용할 수 있다. 클라우드 자원 브로커 시스템은 작업 스케쥴링과 자원 프로비저닝 등이 가격, 처리시간에 중요한 선택 및 수행을 한다. 기존의 많은 논문들에서의 작업 스케줄링은 다중 테넌트 정책의 클라우드가 제공하는 사용자들간의 가상 머신 독립에 초점을 두어 하나의 가상 머신이 하나의 작업에 한정되도록 처리하는 방식이었다. 이는 병렬화의 정도가 낮은 어플리케이션의 경우 시스템 활용률이 낮아 자원 활용율이 떨어진다. 이를 다수의 작업을 멀티 태스킹, 멀티 스레드의 방법으로 하나의 가상 머신에서 처리하도록 하여 스레드 레벨 병렬화의 이점을 이용해 자원 이용률을 높임으로 효율을 높이고자 한다.

• Journal of Korea Port Economic Association
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• v.32 no.2
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• pp.59-71
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• 2016

This study empirically examines the dynamic specification of the ship price model based on a vector autoregressive model and data covering from January 2000 to October 2014. Our results are summarized as follows: first, the relationship between ship price and interest rate shows significantly negative and the relationship between ship price and freight rate shows positive. It provides consistent implication that ship price depends on interest rate and freight rate under the dynamic Gordon model. Second, we apply an impulse response analysis to ship price and find the responses of the ship price from both factors, interest rate and freight rate, which affect during seven periods approximately. Finally, the results of a variance decomposition indicate that freight rate is more important than interest rate on the ship price.

• Management & Information Systems Review
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• v.35 no.3
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• pp.195-212
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• 2016

Utilizing intra-day volume weighted average price (VWAP) based on 1 minute return data of stocks traded on the Korean Stock Exchange, this paper examines and analyzes abnormal returns in reaction to patent listing disclosures as well as the cumulative abnormal returns, traded volumes, the interaction of VWAP spreads, the reaction of volumes, the reaction of VWAP spreads and the realized returns obtained from trading using an event driven arbitrage strategy. The results of the aforementioned research topics are follows. First, our analysis suggests that on average, 0.92% positive cumulative returns arise 1 minute after the patent listing disclosure announcement with high statistical significance, thereby reconfirming that the Korean stock market is a semi-strong form of the efficient market. Employing 3 separate panel tests differentiated by the size factor, we find that the abnormal returns of small sized stocks were less than the returns of medium sized stocks, which goes to support recent research findings suggesting that the size premium is no longer existent in the Korean stock market. Secondly, we show that among the event driven type strategies, the most outstanding realized returns are from the market making strategies. Furthermore, placing market order trades only at the bid or ask price resulted in negative returns. This implies that strategies utilizing a combination of market orders and limit orders, order cancelations ratios and order flows can enhance realized returns.

• Asia Marketing Journal
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• v.3 no.1
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• pp.30-47
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• 2001

본 연구에서는 가상시장에서 인터넷쇼핑몰을 통해 제품을 구매한 경험이 있는 소비자의 재구매의도를 확인하고자 시도하였다. 인터넷쇼핑몰을 통해 제품을 재구매하기 위해서는 이전 구매경험의 만족이 결정적 요인으로 작용할 것으로 가정하였다. 이러한 쇼핑만족에 영향을 주는 요인으로는 쇼핑몰의 구조적 특성(심미성, 이용편리성), 제품특성(품질, 가격), 그리고 서비스 특성(확신성, 신뢰성, 반응성) 등을 포함하였다. 이들 요인이 쇼핑만족에 영향을 주고, 만족이 재구매의도에 영향을 줄 것으로 가정하였다. 또한, 이들 만족과 재구매의도간의 관계는 지각된 위험 및 제품관여에 따라 조절역할을 할 것으로 가정하였다. 이러한 가설들간의 관계를 분석하고자 구조방정식모델을 실시하였고, 조절변인들의 조절효과는 조절회귀분석을 통해 검증하였다. 분석결과, 모든 연구가설들은 유의적으로 나타났다. 즉 쇼핑몰의 구조적 특성, 제품특성 및 서비스 특성은 쇼핑만족에 영향을 주며, 이러한 쇼핑만족은 소비자의 재구매의도에 영향을 주는 것으로 나타났다. 또한 만족과 재구매의도간의 관계는 지각된 위험과 관여수준에 따라 조절역할을 하는 것으로 나타났다

• Journal of KIISE
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• v.44 no.12
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• pp.1258-1268
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• 2017

Capturing real-time daily information on food prices is invaluable to help policymakers and development organizations address food security problems and improve public welfare. This study analyses the possible use of large-scale online data, available due to growing Internet connectivity in developing countries, to provide updates on food security landscape. We conduct a case study of Indonesia to develop a time-series prediction model that nowcasts daily food prices for four types of food commodities that are essential in the region: beef, chicken, onion and chilli. By using Twitter price quotes, we demonstrate the capability of social data to function as an affordable and efficient proxy for traditional offline price statistics.

• Korean Journal of Social Welfare
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• v.68 no.3
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• pp.29-50
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• 2016

This study examined the determinants of housing affordability using the 2014 fact-finding survey of housing. This study identified the effects of characters of districts as well as the effects of characters of family and housing, taking advantage of HGLM(Hierarchical General Linear Model). The results of this study showed that male householder, higher education level, the monthly housing, higher satisfaction of environment of housing are the factors that increased the odds of living at unaffordable housing, but higher income, public transfer recipient, living at sub-standard housing, the Jensei housing are the factors that decreased the odds of living at unaffordable housing. And the higher housing price, the higher rent of the districts increased significantly the odds of living at unaffordable housing, but the higher rate of public housing of the districts decreased the odds of living at unaffordable housing. This study provides the basis that the price of housing and rent should be controled and the policy of public housing should be expanded for housing welfare.

• Journal of the Korean Society of Food Science and Nutrition
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• v.41 no.8
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• pp.1182-1189
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• 2012

The purpose of this study was to analyze university student' perception of the price of coffee shops using price sensitivity measurements. The questionnaires were distributed to 640 university students in Changwon, Korea from March 13 to April 8, 2011. A total 571 were used for the final analysis, which excluded improperly-completed questionnaires. The results of this study were as follows. Indifference prices (IDPs) were \2,200 for on-campus coffee shops and \2,850 for off-campus coffee shops. The optimum price points (OPP) were \2,300 for on-campus coffee shops and \2,850 for off-campus coffee shops. The price stress range (PSR) was \100 (\2,200~2,300) for on-campus coffee shops and \0 (\2,850~2,850) for off-campus coffee shops. The point of marginal cheapness (PMC) was \1,100 for on-campus coffee shops and \1,500 for off-campus coffee shops, whereas the point of marginal expensiveness (PME) was \3,600 for on-campus coffee shops and \4,100 for off-campus coffee shops. The ranges of acceptable prices (RAP) were \2,500 (\1,100~3,600) for on-campus coffee shops and \2,600 (\1,500~4,100) for off-campus coffee shops. On the basis of IDP percentage, university students were more sensitive to off-campus coffee shops than on-campus coffee shops. In contrast, on the basis of PSR and RAP, university students were more sensitive to on-campus coffee shops than off-campus coffee shops. Therefore, the price increase for an americano should be recommended to be from \1,100 to \3,600 for on-campus coffee shops and from \1,500 to \4,100 for off-campus coffee shops. The manager of on-campus coffee shops should be careful when increasing the prices, and the manager of off-campus coffee shops should make it possible for customers to perceive service quality.

• Proceedings of the KAIS Fall Conference
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• 2008.11a
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• pp.117-120
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• 2008

주요 방산물자의 경우 최저가 입찰 방식의 채택은 방산업체들 간 물량부족에 따른 과다 수주 경쟁으로 인해 터무니없는 낮은 가격으로 업체가 결정되는 경우가 발생되고 있다. 이러한 제도 운영은 방산 물자의 기술 개발 촉진에 장애요인으로 작용할 뿐만 아니라 방위력 증강은 물론 방위산업 육성에도 많은 지장을 초래할 우려가 있다. 본 논문에서는 실천 가능한 방위산업 입찰제도를 도출하고 입찰제도를 개선하기 위해서, 현재 방산청에서 실시하고 있는 최저 입찰제도의 문제점을 알아보고, 미국, 유럽과 일본의 정부조달제도와 방위산업에서의 입찰방식을 살펴본다. 그리고 협상에 의한 계약 체결시 적용하는 회계예규의 평가산식 불합리성 및 문제점을 고찰하고, 국내 방산업체가 느끼는 입찰제도의 문제점을 설문을 통해 파악/분석함으로 방위사업청 제안서 평가 지침에 대한 적절한 방식을 제안하고자 한다.