• The Journal of Society for e-Business Studies
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• v.21 no.3
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• pp.51-78
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• 2016

Online-to-offline (O2O) commerce is the new trend that merges online commerce with traditional industries in various fields. The primary purpose of this paper is to find out which factors influence customers' intention to switch from call-based driver-for-hire services to O2O app-based services. This study used variables and factors based on Theory of Switching Intention, and Extended Unified Theory of Acceptance and Use of Technology in order to design research questions. We surveyed 500 users of call-based driver-for-hire services. According to the result of this study, dissatisfaction with the current call-based driver-for-hire services is estimated to be a significant factor that strengthens customers' intention to switch from the call-based driver-for-hire services to the app-based services. Loyalty to the previous call-based driver-for-hire services was not seen as a crucial motivator that causes customers to switch to the new O2O driver service. Switching cost also did not play a key role in explaining the relationship between dissatisfaction with the current call-based service and the intention to use the new app-based service. Performance expectancy, easiness in use, the level of user's knowledge or available assistance in relation to the use of app-based services, and expectancy for reasonable price was found to have meaningful impacts on customers' intention to switch from the call-based driver-for-hire services to the app-based services. Age, gender and user experience on the new service were found incapable of moderating the relationship between aforementioned factors which influence customers' choice of the app-based driver-for-hire service, and customers' intent to switch to the app-based service.

• Journal of KIISE:Databases
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• v.30 no.4
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• pp.397-407
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• 2003

Transactions of updating spatial dta with mobile clients are log transactions because a user disconnected from a server surveys real features and updates them. In this environment, it is appropriate to exploit the optimistic approach based on the validation test in order to control the concurrency of transactions. On the contrary, the pessimistic concurrency control scheme makes transactions wait for a long time due to the lock. In this paper, we propose the surrogate transaction model and implement its manager for the S-S-M(Server-Surrogate PC-Mobile Client) structure which is appropriate for updating spatial data in mobile environments. In the S-S-M structure, the mobile client communicates with the server by the surrogate PC. We extend the validation condition in consideration of spatial relationships between spatial objects in this model. We also present the commit protocol where the user of a surrogate PC adjusts objects of the conflicted surrogate transaction to minimize costs for the abortion of the transaction.

• The Korean Journal of Financial Studies
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• v.1 no.2
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• pp.331-349
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• 1994

자본구조 이론은 자본조달이 기업의 가치에 영향을 미칠 수 있을 것인가를 중심으로 연구되어 왔으며 최근에는 자본구조의 결정요인으로서 대리인 비용(Agency cost)을 도입하여 기업의 자산형태와 자본구조간의 상호작용 가능성에 대해 분석되고 있다. 본 연구에서는 MM이론 이후의 자본구조에 관한 발전과정에 대해 이론적 고찰을 하고 우리나라 상장기업을 20개 업종으로 분류하여 대리인 비용을 중심으로 자산형태가 자본구조에 어떠한 영향을 미치는가를 실증분석 하였다. 실증분석결과 유형고정자산투자는 leverage와 정의 상관관계를 보였으며 무형고정자산투자는 leverage와 부의 상관관계를 보인다. 그러나 수익성이 높은 기업은 leverage와 정의상관관계를 보여, 수익성이 높을 수록 부채를 적게 이용한다는 Myers의 이론이 우리나라에서는 타당성이 없음을 증명하고 있다.

• Journal of Convergence for Information Technology
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• v.9 no.5
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• pp.201-209
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• 2019

The purpose of this study is to analyze whether parents with developmental disabilities are well represented by the persons with developmental disabilities. Analysis data is based on the data from the Survey on Disability Survey in 2014. We analyzed the consistency and biases of the parent's proxy respondents' opinions by the degree of agreement between the contents of the person with developmental disabilities and the value of items that the parents answered on behalf of the development disabled. First, the parents' proxy respondents responded well to the actual situation such as life satisfaction for the developmental disabled, while the parental proxy respondents showed the positive bias to overestimate the cost items and the negative bias to recognize the discrimination. Second, in relation to independent living, the majority of the parents of the developmental disabled respondents had a high agreement with the developmental disabled person. However, about 5 ~ 10% of the parents' proxy respondents seem to have a tendency to distort the independent living policy by preferring non-standard housing types, unlike those with developmental disabilities. Based on this, it was proposed that the respondents should be able to receive the answers of the possible parties in the future research on desire and independent living related intention toward the developmental disabled, and the research on the matching of the proxy response is needed in a multidimensional manner.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.37 no.2
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• pp.95-101
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• 2024

This paper introduces an optimized design for a sensor bracket used to measure the wear amount of an automobile brake pad, based on a dynamic kriging surrogate model. During testing, the temperature of the brake pad can increase beyond 600℃, which often causes sensor malfunction. Therefore, it is essential to optimize the shape of the sensor bracket to minimize heat transfer. To reduce the computational cost of the optimization, the heat-transfer simulation is replaced by a dynamic kriging surrogate model. Dynamic kriging utilizes the best combination of correlation and basis functions and constructs an accurate surrogate model. Following optimization, the temperature of the sensor position decreases by 7.57%. The results from the surrogate model under optimum conditions are verified by a heat-transfer simulation, and the design optimization using a surrogate model is found to be effective.

• Journal of Environmental Policy
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• v.6 no.4
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• pp.103-127
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• 2007

This study presents the political economics models to explore the political landscape of special interest groups influencing the government's decision making process for implementing international environmental standard. Starting with the popular menu-auction types of lobbying frameworks in the literature, the study extends its scope of research to multi-principal and multi-agency based international interest group politics and its hybrid case in order to bring the interaction of the relevant interest politics to the fore. Within a specific factor model of international trade between 2 small open economies, we compare the political equilibrium environmental standards in different institutional frameworks which can be feasible in the sense of recently growing role of environmental interest group. Although the conventional finding suggests that cooperative bargaining between the two countries can attain the globally optimal level of the standard, the paper rather explains that the cooperation between the national interest groups and the hybrid case also generate the stricter standard then national interest politics usually do.

• Environmental and Resource Economics Review
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• v.16 no.1
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• pp.3-26
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• 2007

This paper analyzes the effects of asymmetric reimbursement in a delegate model where the lawyers for a citizen and a polluting firm work on a contingent-fee basis. The major findings from the paper are as follows: (i) the asymmetric reimbursement triggers environmental conflicts by increasing the citizens' expected surplus; (ii) it enhances the possibility of settlement by decreasing the magnitude of expected loss less expected surplus; (iii) settlements reduce the total litigation effort levels, thus curtailing the rent dissipation; (iv) The total litigation effort levels increase if the conflicts result in trials rather than settlements.

• The Korean Journal of Financial Management
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• v.9 no.2
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• pp.31-55
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• 1992

금융기관(金融機關)은 기업, 가계, 정부와 함께 우리 경제를 구성하는 주요한 부분이다. 금융기관은 최종적 차입자와 최종적 대부자를 중개하는 과정에서 여러가지 서어비스를 우리에게 제공하면서 존재한다. 금융기관이 제공하는 서어비스는 우리의 경제생활에 매우 중요한 영향을 미친다. 금융기관의 행동이 경제에 미치는 영향을 분석하기에 앞서 어떤 조건하에서 금융기관이 존립할 수 있는가를 알아보는 것도 금융기관의 행동을 이해하기 위해 의미있는 일일 것이다. 본 논문은 정보불균형(情報不均衡)의 관점에서 금융기관의 존립을 분석, 설명하는데 그 목적이 있다. 경제문제의 불확실성과 복잡성의 증대는 민간의 제한된 합리성을 더욱 제한되게 만들고 역으로 제한된 합리성 때문에 불확실성과 복잡성은 더욱 중요한 문제가 된다. 여기에다 인간의 이기주의가 결합하게 되면 정보의 유통이 불완전해져 정보가 불균등하게 분포하게 되는 현상이 생긴다. 정보불균형(情報不均衡)은 거래를 위촉시키고 극단적인 경우 시장실패(市場失敗)를 가져온다. 금융기관은 정보생산을 통해 거래위축이나 시장주패(市場朱敗)를 방지할 수 있는 역할을 한다. 금융기관이 정보생산을 한다고 해도 개별정보생산자나 직접 금융에 비해 정보생산비용면에서 우위를 가질 수 있어야 금융기관의 존립은 가능할 것이다. 즉 정보불균형(情報不均衡)을 해소하기 위한 정보생산이 금융기관이 존립할 수 있는 필요조건이라면, 정보생산의 경제성은 금융기관이 존립할 수 있는 필요충분조건이 된다고 할 수 있다. 금융기관이 개별정보생산자나 직접 금융보다 정보생산면에서의 경제성을 가질 수 있는 가능성은 첫째, 분산효과(分散效果)로 인한 대리비용(代理費用)의 감소(減小) 둘째, 분산효과(分散效果)로 인한 구성원보상(構成員補償)의 불확실성감소(不確實性減小) 세째, 금융기관 구성원간의 정보공유효과(情報共有效果)이다.

• The Korean Journal of Financial Management
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• v.9 no.1
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• pp.177-192
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• 1992

본 논문에서는 MLP(master limited partnership) 분리(分離)라는 기업구조(企業構造) 개편(改編)(restructing)이 기업의 시장가치에 미치는 영향을 사건연구(事件硏究)(event study) 방법론을 통하여 분석하였다. 실증분석의 결과 MLP 분리(分離)로 인한 모기업의 주가상승이 통계적으로 유의한 것으로 나타났다. 세금혜택(稅金惠澤), 대리인(代理人) 문제(間題), 자금조달(資金調達) 그리고 자산증권화(資産證券化)(securitization) 둥의 측면에서 MLP 분리(分離)의 경제적 의미를 살펴보았다. 경영자에 의한 자유현금(自由現金)흐름(free cashflow)남용의 방지를 통한 대리인(代理人) 비용(費用)(agency cost)의 감소, 정보불균형(情報不均衡)에 관련된 자금조달상의 불이익의 극복가능성이 모기업의 주가상승을 가져올 수 있는 보다 중요한 요인들로 제시되었다. 이러한 요인들의 상대적 중요성에 대한 실증분석 특히 자유현금흐름 가설의 검증이 앞으로의 과제다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.28 no.1
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• pp.105-113
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• 2005

I investigate whether the efficient ratios used as the proxies of the agency costs maintained by Ang et al.(2000) is significant. Utilizing a sample of 77 manufacturing companies listed on the KOSDAQ from the TS2000 of the KSDA, The results are as follows. Agency costs are found to be decreasing with the ownership share of controlling shareholders and accounting performance becomes higher. But firm value measured by Tobin's Q ratio becomes lower according as the ownership of the controlling shareholders increases. If agency costs decrease in proportion to controlling shareholder's share, firm value should be higher according to the agency theory by Jensen and Meckling(I976). But the results of the empirical test of this study are inconsistent with Jensen and Meckling's(1976). Therefore the following study on the more useful proxies stand for agency costs should be needed.