• Environmental and Resource Economics Review
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• v.24 no.4
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• pp.607-627
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• 2015

As observed and experienced in EU ETS, allowance price volatility is one of major concerns in decision making process for $CO_2$ abatement investment. The problem of linearly non-separable profits functions could emerge when one power company holds several power plants with different technology specifications. Under this circumstance, conventional analytical solution for investment option is no longer available, thereby calling for the development of numerical analysis. This paper attempts to develop a Monte-Carlo least squares model to analyze investment options for power companies under emission trading scheme regulations. Stochastic allowance price is considered, and simulation is performed to verify model performance.

• Journal of the Korea Society of Computer and Information
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• v.6 no.3
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• pp.122-130
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• 2001

The purpose of this study is to find the economic effect of educational investment. In order to finding this. I have investigated to historical background of educational investment and as the method of analysis I examined the rate of return approach such as the residual approach. and the simple correlations approach. Historically, economics of education has concentrated on surrounding the relationship between education and economy, which the implicit assumption that investment in education contributed to increase the quality and productivity of the labor force and thus raise future individual and national income levels. First of all, at this paper I found to need boldness to increasing the amount of education budget annually and also positively studying about economics of education in Korea for high and good quality analysis of expansion economy and education.

• 한국정보통신설비학회:학술대회논문집
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• 2004.08a
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• pp.15-18
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• 2004

LHM (Left Handed Material)은 특정 주파수 범위에서 음의 유전율과 투자율을 가지는 물질이다. 이 물질의 유효 유전율과 투자율은 분산 특성을 가지며 로렌츠 (Lorentz) 물질과 비슷한 형태를 가진다. 본 논문에서는 FDTD (Finite Difference Time Domain) 법을 바탕으로 한 PLRC (Piecewise Linear Recursive Convolution) 법을 이용하여 LHM 내의 유효 전파특성을 모의한다. 모의실험 결과는 음의 유전율과 투자율을 가지는 주파수 범위를 보여준다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2003.05a
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• pp.612-619
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• 2003

실물옵션은 전통적인 경제성 평가기준의 하나인 순현재가치 분석법이 의사결정 과정에서 경영의 유연성을 무시함으로써 투자 혹은 자산의 가치를 낮게 평가하는 단점을 제거하고 이를 평가에 적절히 포함시킬 수 있다고 여겨지고 있어 새로운 평가방법으로 주목을 받고 있다. 특히, 정보기술(IT) 분야에서는 다음과 같은 이유 때문에 전통적인 현금흐름할인 방법이 효과적이지 못할 수 있다. (1) 우선, 정보통신 분야에서 대부분의 정보기술 기반 투자 프로젝트는 막대한 자본이 소요되기 때문에 기업들은 이를 피하기 위하여 단계적인 투자계획을 세우는 경우가 많다. (2) 또한, 초기 기반에 대한 투자의 주요한 혜택이 대부분 그 이후 단계의 투자에서 구현되기 때문에 성급한 초기투자에 대한 경제성 평가는 이후의 혜택을 무시할 가능성이 많아진다. (3) 마지막으로 초기의 투자 프로젝트에 참여하지 못하면, 이 후의 프로젝트에 참여하기 어렵기 때문에 미래의 혜택을 얻을 수 없게 된다. 이러한 여러 가지 이유로 이를 적절히 평가할 수 있는 실물옵션 평가방법이 선호된다. 본 연구에서는 정보통신 분야의 투자와 같은 대규모 프로젝트의 특징을 평가방법의 입장에서 살펴보고, 실물옵션 개념을 응용하여 이러한 투자 형태의 평가를 위한 모델을 개발하고 적용방법을 생각해본다.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.17 no.6
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• pp.39-50
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• 2022

Based on the signaling theory, this study examined whether startups are more likely to attract venture investment when receiving government R&D subsidies. First, we reviewed previous studies of the investment decision-making process of venture capitalists and understood the conditions that influence investment decisions. Based on previous studies on the signal effect of government subsidies, particularly government R&D grants, on inducing private fund investment, this study revealed a mechanism to induce venture investment by startups. In addition, in order to verify whether government R&D subsidies have the effect of inducing venture investment, an empirical analysis was conducted based on data from startups under seven years and certified as a venture companies in 2021. This paper used PSM(Propensity Score Matching) method and DID(Difference In Difference) analysis for an empirical study to analyze the average treatment effect on the treated group(beneficiary startups of government R&D grants). As a result of empirical analysis, companies that receive more government R&D subsidies after starting a business are more likely to attract venture investment. From two to three years after conducting the first government R&D project, startups that received government R&D grants attracted more venture investment than those that did not. The results of this paper demonstrate that government R&D projects can also affect the venture investment ecosystem, giving policy implications to government R&D projects targeting startups. It is also expected to suggest strategic implications to startups that need new funding.

• Journal of the Korean Magnetics Society
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• v.5 no.1
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• pp.71-78
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• 1995

We introduced and compared the two methods, 'figure-8 coil method' and 's-parameter method', to measure high frequency permeability of magnetic films. We made a permeameter by using s-parameter method and discussed about problems and solutions in measuring permeability. We can measure the permeability rapidly and exactly up to 200 MHz with the aid of computer program and the low level permeance detection limit is about $1\mu\textrm{m}$.

• Proceedings of the KIEE Conference
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• 2007.11b
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• pp.100-102
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• 2007

본 논문에서는 혼합정수 선형계획 법을 이용하여 장기 전력계통 계획수립시 최적의 설비를 투자할 수 있는 기법을 제안하였다. 발전설비와 송변전설비는 하나의 망으로 연결되어 상호 보완적 영향을 주기 때문에 계통계획시 두 설비를 동시에 평가하는 것이 무엇보다 중요하다. 또한 계획기간 전체에 대해 투자비를 고려하여 비용을 최소화해야 한다. 이를 위해 선형계획법을 계통계획에 도입하여 최소비용의 투자비를 가지고 공급 신뢰도 기준를 만족할 수 있는 최적 장기 전력계통 계획 수립기법을 개발하였다. 개발된 기법을 Garver 6모선 계통 및 제3차 전력수급기본계획에 대해 모의하여 결과의 타당성을 검증하였다.

• Journal of Korean Society of Transportation
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• v.17 no.2
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• pp.193-198
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• 1999

An asymptotic distribution of the ratio of two normal vectors is estimated. Using the estimated asymptotic distribution, an approximation method to estimate confidence interval of passenger's value of travel time is proposed. As a result of empirical study the 95% confidence interval of value of travel time of home-to-work trips in city of Seoul is estimated at ￦7341.25$\pm$1945.05/hr.

• Journal of Korea Port Economic Association
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• v.23 no.1
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• pp.19-39
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• 2007

Korean port developments have been mostly made by the central government. With the introduction of the Port Authority system, however, roles and function assignments of the central government in port development have been in change and the Port Authority has to find a solution for inducement of private investment in port development. This paper has examined the current legal system of port developments and then sought the way for inducement of private capital to improve specialty and efficiency of harbor facilities management and development under Port Authority. As the Ministry of Maritime Affairs and fisheries(MMAF) has two types of legal system for inducement of private investment on port developments, the Port Authorities can also have two types of private finance. Private finances by the Port Authorities has some more critical advantages than the one by the central government. It is also required to change the the administrative permissions and concession agreements which MMAF conveyed to private participants in port developments into the concession agreements between Port Authorities and private participants.

• Journal of Digital Convergence
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• v.10 no.4
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• pp.181-190
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• 2012

Cost of capital is one of the key factors of accounting regulation policy for telecommunication market. This paper aims at investigating efficient policy improvements concerning accounting regulation for telecommunication market focused on cost of capital calculation methods and its application. At First, cost of capital estimating method should be improved. In estimating the cost of equity capital, it is necessary to use benchmark method for Equity risk premium. It will reduce analytical errors caused by a rapid economic change and inflation. It is also more desirable to use debt premium adding method for the cost of debt capital. Optimal capital structure method may be considered a better way to estimates capital structure. Secondly, cost of capital estimating process also has to be reformed. Telecommunication industry changes rapidly so it does not reflect fast environmental changes. Therefore, cost of capital should be calculated every year. Cost of capital should be calculated by individual companies. There is information asymmetry between regulators and regulatees. Because of that cost of capital calculating process takes long time and cost a lot. To solve this problem, regulator should legislate on cost of capital calculation and then regulating companies report the calculating result. Lastly, major telecommunication companies are all listed now and it is possible to calculating it separately. We must continuously improve the estimating method and application of cost of capital and due to the fast growing of telecommunication industry. The process of determining the calculating method must be discussed and best method chosen.