• KDI Journal of Economic Policy
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• v.34 no.2
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• pp.17-40
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• 2012

We study externality costs of capital investment under limited commitment. We solve for the constrained efficient allocation with a limited commitment environment and find positive externality costs of capital investment provided that full-risk-sharing is not feasible. In a decentralized version of limited commitment environment, a one unit increase of capital investment by an agent increases all individuals' autarky values in the economy and generates externality costs in the economy. This externality cost provides a rationale for positive capital taxation even in the absence of government expenditure. In order to internalize this costs, the government use a positive rate of linear capital tax in the decentralized economy.

• The Journal of the Korea Contents Association
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• v.15 no.1
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• pp.95-104
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• 2015

Due to its intrinsic characteristic, exterior bus advertising is exposed to an unspecified number of the general public. Thus it influences on the urban publicness of the city, simply beyond leaving it as a personal marketing activity toward the industry's profit. Seoul city's campaign to improve exterior bus advertising has been to effective in removing advertisements of alcohols, tobaccos, and lascivious contents, however, there still are several advertisements that should be examined from the view point of publicness. For the case of UK, where exterior bus advertising is also actively utilizing owing to its high exposure and effectiveness, they are administrating it by setting up guidelines and regarding the importance of publicness. I also identified the meaning of publicness of exterior bus advertising from the aspects of 'publicness of territories', 'publicness of subjects', 'publicness of reasoning', and 'publicness of procedures'. Through this, I suggested that both commercial right of exterior bus advertising in the private sector and citizen's right of publicness can be harmoniously developed by properly controlling and administrating the exterior bus advertising. Furthermore, artistic approach to the exterior bus advertising from the viewpoint of city environment is expected to elevate the aesthetic possession and the level of design sense of citizens.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.7B
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• pp.806-817
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• 2011

This paper constructed a model estimating mobile nework externalities based on Ofcom model and estimated externalities mark-up. The main results are as follows: 1) there are 15,626,711 marginal subscribers in mobile network irrespective of its maturity. 2) the value of network externalities ranges 2.1 billions won to 435.4 billions won. 3) the extrenalities mark-up to support marginal subscribers ranges 0.03 won to 6.47 won. This results provide useful implications to policy about mobile network terminations fee as well as externalities mark-up disputes.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.06a
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• pp.187-188
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• 2009

초대형 컨테이너선의 출현 이후 각국의 항만들은 메가 허브 포트가 되기 위하여 첨단기술을 컨테이너터미널 업무에 적용하는 등 효율성과 생산성 향상을 위한 노력에 박차를 가하고 있다. 컨테이너터미널에서는 게이트, 야드, 안벽 업무로 나누어져 있으며, 이들 업무간의 효율성 향상을 위해서는 각 업무들 간에 인터페이스가 원활하게 유지되어야 한다. 현재 컨테이너터미널의 야드 업무에서는 외부차량과의 인터페이스를 원활하게 하기 위해서 바코드를 이용한 키오스크 기반 외부트럭 인터페이스를 사용하고 있으나 변화해가는 항만 환경 속에서 좀 더 효율적인 야드 업무 처리를 위해서는 신기술이 적용된 외부트럭 인터페이스가 개발되어야 할 필요가 있다. 본 연구에서는 최근 컨테이너터미널 야드 업무에서 외부트럭과의 인터페이싱 방안으로 활발하게 적용되고 있는 RFID 기반 외부트럭 인터페이스와 기존 사용되고 있는 키오스크 기반 외부트럭 인터페이스를 비교 분석을 통하여 효율성을 평가하고자 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.425-428
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• 2002

To understand and forecast the wireless internet market in Korea, we will analyse the network externalities in wireless internet market into communication network externalities and hardware/software network externalities. The wireless market has two competing streams, one is mobile internet and the other is wireless fan internet. Both are characterized by strong network externalities which lead to increasing return to stale. Mobile internet is supposed more suitable for communication and WLAN for data. However these two system will compete in some area, and the critical factor to deride the winner is supposed to be the network externalities as in so many other high-tech industries had showed.

• KDI Journal of Economic Policy
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• v.31 no.2
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• pp.87-126
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• 2009

In the internet portal industry, the indirect network externality from portal visitors to advertisers and the direct network externality among portal visitors have important implications for anti-trust policies. This paper examines the existence and the magnitude of the direct/indirect network externality in the Korean internet portal industry and measures its effect on the market power of the internet portals. The results show that the direct/indirect network externality is substantive in the industry hence the market share of a portal in the visitors' side has the 'leverage' effect on its market power in the advertisers' side.

• Journal of Digital Convergence
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• v.17 no.10
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• pp.177-186
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• 2019

The purpose of this study is to enhance the understanding of consumer experience and behavior of Internet of Things (IoT) services and to provide practical implications through investigating the impact of benefits-cost factors and network externalities on consumers' adoption intention of IoT services. An online survey was conducted on general consumers in their 20s to 60s who were aware of the IoT services and 328 data were collected. Using SPSS 24.0, frequency analysis, correlation analysis, factor analysis, and hierarchical regression analysis were conducted. As a result, the level of consumers' IoT service experience in various contexts was examined, and entertainment, informativeness, loss of humanity, compatibility, and complementarity were found to have a significant effect on consumers' adoption intention of IoT services. This study suggests that strengthening network externality effects by increasing compatibility and complementarity is important in promoting consumers' adoption of IoT services. In future studies, it is necessary to adopt specific Internet of Things services to verify the validity of the models developed in this study.

• 한국신재생에너지학회:학술대회논문집
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• 2009.11a
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• pp.281-284
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• 2009

본 연구의 주요 목적은 정부에서 추진하고 있는 신재생에너지 보급정책의 현재까지의 성과를 분석하고, 장애요인을 파악하여 개선방안을 제시하는 데에 있다. 따라서 보급정책의 하위 프로그램들의 정성적 평가를 위하여 미국 DOE(Department of Energy) 산하 EERE(Energy Efficiency and Renewable Energy)에서 제시하고 있는 Peer Review Guide(2004)를 따라 외부동료평가(Peer Review)를 사용하였다. 그러나, 미국 EERE에서 제시하고 있는 가이드를 한국에 곧바로 적용함에는 무리가 있기에, 하위프로그램들의 외부동료평가를 실시하기에 앞서서 외부동료평가 설문 평가속성 결정을 위해 전문가 설문을 한 차례 더 진행하였다. 첫 번째 전문가 설문에서는 투입요소의 적정성 (Quality), 생산성 (Productivity), 성취도 (Accomplishments), 연계성(Relevance), 관리 (Management), 전체적 평가 (Overall Assesment) 항목 중 어떠한 항목을 선택해야 하는지, 국문 번역이 적절한지 등을 살펴보았다. 두 번째 설문에서는 이렇게 해서 선정된 항목을 바탕으로 각 프로그램 별로 Peer Review Guide에서 제시한 외부동료평가를 시행할 예정이다.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.9 no.5
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• pp.565-575
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• 2019

This study aimed to examine the influence of physical environment, microclimate, and comfort on sustaining outdoor activities. This study has identified the main factors that influence sustaining outdoor activities as physical environment, comfort in the physical environment, microclimate and microclimate comfort. For analysis, the study conducted the investigation on pedestrian walkability during spring, summer and winter of the year 2017. The microclimate levels were also recorded at the same time. The method of logit regression analysis was used to analyze these outcomes. The result showed that the comfort and safety of the physical environment as well as the ideal climatic conditions, in terms of temperature, wind level, and solar insolation, were related to sustaining outdoor activities. Also, walking and shopping in the physical and climatic environment were the factors that were found to be more influenced than the act of remaining in a place and forming conversations.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.13 no.4
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• pp.271-282
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• 2015

External cost is cost imposed on a third party when producing or consuming a good or service. Since the 1990s, the external costs of nuclear powered electricity production have been studied. Costs are a very important factor in policy decision and the external cost is considered for cost comparison on electricity production. As for nuclear fuel cycle, a chosen technology will determine the external cost. However, there has been little research on this issue. For this study, methods for external cost on nuclear power production have been surveyed and analyzed to develop an approach for evaluating external cost on nuclear fuel cycles. Before the Fukushima accident, external cost research had focused on damage costs during normal operation of a fuel cycle. However, accident cost becomes a major concern after the accident. Various considerations for external cost including accident cost have been used to different studies, and different methods have been applied corresponding to the considerations. In this study, the results of the evaluation were compared and analyzed to identify methodological applicability to the external cost estimation with nuclear fuel cycles.