• 조명전기설비학회논문지
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• 제28권7호
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• pp.97-105
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• 2014

This article examines the causality relationship among SMP, base-load share, LNG import price, and exchange rate in Korean power market during 2002~2012, using unit root test, cointegration test, and vector error correction model(VECM). The cointegration test shows that 4 variables without unit root have been in the long-run causality. As the results of ECM, SMP is analyzed to have been unilaterally caused from LNG import price and base-load share in the shot-run, while it has been unilaterally caused from LNG import price and exchange rate in the long-run. This article has the following policy implications: the adjustment of exchange rate to reduce he risk of LNG import price and the proper securement of base-load share for the long-run stability of SMP.

• International journal of advanced smart convergence
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• 제8권2호
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• pp.132-139
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• 2019

We address the problem about forecasting the direction of stock price movement in the Korea market. Recently, the deep neural network is popularly applied in this area of research. In deep neural network systems, proper parameter initialization reduces training time and improves the performance of the model. Therefore, in our study, we propose a novel parameter initialization technique and apply this technique for the stock price movement prediction model. Specifically, we design a framework which consists of two models: a base model and a main prediction model. The base model constructed with LSTM is trained by using the large data which is generated by a large amount of the stock data to achieve optimal parameters. The main prediction model with the same architecture as the base model uses the optimal parameter initialization. Thus, the main prediction model is trained by only using the data of the given stock. Moreover, the stock price movements can be affected by other related information in the stock market. For this reason, we conducted our research with two types of inputs. The first type is the stock features, and the second type is a combination of the stock features and the Korea Composite Stock Price Index (KOSPI) features. Empirical results conducted on the top five stocks in the KOSPI list in terms of market capitalization indicate that our approaches achieve better predictive accuracy and F1-score comparing to other baseline models.

• 농촌계획
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• 제28권4호
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• pp.69-81
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• 2022

The change in farmland price has almost always been focused on not only farmers but policy-decision makers; for farmers to get information before purchasing farmland; for policy-decision makers to use appropriate policy tools to stabilize the market. So far the change in farmland price has been calculated as a form of average change on a year-to-year base. Such calculations have become one of the causes which lead to misunderstanding of the farmland market because the year-to-year average change includes changes in price as well as changes in the number of trades and sizes of traded farmland. This paper is designed to suggest a proper method of building a price index for farmland as a tool to review the price change. We considered the applicability of several types of price indices and concluded that a Laspeyres-type price index is the most reasonable choice. A Laspeyres-type price index, however, has a shortcoming in which a reference year's weight may affect the whole period of an index. Thus, we also suggest two other weights, a three-year average including a reference year and a share of farmland. All indices show that farmland prices have risen significantly in recent 10 years. We hope that the indices will be developed into one of the government's formal statistics.

• 무역상무연구
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• 제42권
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• pp.337-364
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• 2009

Trade remedy is the system that additional duty or import quantity restriction would be imposed on the import products, in case that unfair imports damage domestic industry or even proper import products damage significantly domestic industry. The system is secured by the act of unfair trade practice investigation & industrial damage remedy, tariff act, WTO agreement. Anti-dumping duty act is the system that duties are assessed with the equal or less amount of the difference between normal transaction price and dumping price, in case that the product imported under dumping price causes or may cause damages in domestic industry, or the development of domestic industry should be delayed practically. Recently, the problems related with anti-dumping duty imposed as the part of the trade remedy occur frequently. It is necessary to discuss whether the anti-dumping duty act is practically trade remedy which does comply with GATT regulations and WTO agreements as the criteria of international law and is in line with the intent of domestic act in the suffered country, or it does return to protective trade or reduce the protection of consumer. On the basis of this discussion, it would be difficult to impose the antidumping duty on industrial products in order to protect domestic industry, when considering the expected free trade agreements of Korea-US, Korea-China and Korea-Japan. In order to survive under the current severe competition of world trade market, companies should raise the competitiveness by themselves without relying on the current trade acts to provide with a certain protection. This thesis should bring those attentions.

• Journal of Electrical Engineering and Technology
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• 제12권1호
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• pp.1-10
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• 2017

With the current global need for eco-friendly energies, the large scale use of Electric Vehicles (EVs) is predicted. However, the need to frequently charge EVs to an electrical power system involves risks such as rapid increase of demand power. Therefore, in this paper, we propose a practical smart EV charging scheme considering a Time-of-Use (ToU) price to prevent the rapid increase of demand power and provide load leveling function. For a more practical analysis, we conduct simulations based on the actual distribution system and driving patterns in the Republic of Korea. Results show that the proposed method provides a proper load leveling function while preventing a rapid increase of demand power of the system.

• 한국게임학회 논문지
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• 제5권2호
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• pp.29-36
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• 2005

게임 신제품 가격결정은 기업의 유지 및 운영에 많은 영향을 미치는 부분이다. 적정한 제품가격 결정에 따라 소비자들의 선호 및 반복적인 구매의욕을 자극할 수 있기 때문이다. 하지만 게임업계에서는 제품특성과 광고, 원자재 등에 포함되는 지출 금액에 따라 가격책정을 하는 것을 선호하고 있고, 경쟁기업대비 가격 결정 등 기업의 입장 및 시장동향에 의한 가격을 결정하고 있는 경우가 현 기업의 상황이다. 따라서 많은 기업들은 제품의 가치를 제대로 평가받지 못하여 현 가격보다 낮게 또는 높게 책정해 매출 부진, 고객이탈, 신규고객유치 부진 등 경영상에 많은 악영향을 미치고 있다. 이러한 차원에서 본 연구의 방향을 기업입장 및 시장동향에 의한 가격결정보다는 소비자가 신제품을 바라보는 관점에서 제품을 평가하는 부분에 초점을 맞추어 신제품 가격을 결정하고자 하는데 중점을 두었다. 게임유형별 적정가격을 분석한 결과를 보면 한국의 게임 사용자들은 시뮬레이션 게임, RPG 게임, 아케이드 게임의 경우 "3만원 때의 가격"을 선호하는 것으로 나타났으며, 온라인 게임인 경우 "2만원 때의 가격"을 선호하는 것으로 나타났다. 이는 각 게임유형별로 가지고 있는 특성을 잘 반영하여 나타난 것으로 분석된다.

• Asia Marketing Journal
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• 제14권3호
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• pp.49-68
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• 2012

When a channel is vertically separated, there can be inefficiencies, double marginalization. Channel coordination to amend this inefficiency has been an important issue in marketing and economics. Channel coordination deals with maximization of joint profit and achieving proper profit sharing among participants. In this paper, a manufacturer and heterogeneous multiple retailers with exclusive territory are assumed, and channel coordination with two-part tariff is considered. When multiple heterogeneous retailers are assumed, profit sharing can be an issue even though the tariffs based on marginal cost can maximize joint profit. In case of multiple heterogeneous retailers, the manufacturer earns the same profit (fixed fee) from each retailer. This means that a large retailer occupies all the gaps of channel profit between small and large markets. Then, the manufacturer, which generally plays the role of Stackelberg leader, will consider increasing fixed price or marginal price to earn more profit from large retailer. Those reactions can sacrifice maximization of joint profit by making small retailer withdraw or by changing the sales quantities. In this paper, to maximize joint profit and achieve proper profit sharing, two kinds of optional tariffs are considered. The first is an optional two-part tariff based on marginal cost and the second is an optional modified two-part tariff in which marginal prices are higher than the manufacturer's marginal cost. In both types of optional tariffs, maximization of joint profit in each market can be achieved. Moreover, optional tariffs alleviate the problem of profit sharing. Optional tariffs can provide a manufacturer more profit from a large retailer when profit from a small retailer is given. However, the analysis shows that the maximum share of manufacturer from a large retailer is restricted by the condition for self-selection. In case of optional two-part tariffs based on marginal cost, if the gap between demands is large, the maximum share of the manufacturer is sufficient to achieve proper profit sharing. If the gap between demands is not sufficiently large, the manufacturer cannot earn sufficient share from increased profit. An optional modified two-part tariff where marginal price is more than marginal cost of manufacturer is considered because of this scenario. The marginal price above the marginal cost may additionally control the distribution of the increased profit. However, the analysis shows that a manufacturer's maximum profit from a large retailer with given profit from a small retailer is the same as or lower than the maximum profit when optional two-part tariffs based on marginal cost are applied. Therefore, it can be concluded that the optional modified tariffs do not have additional contribution to profit sharing relative to the tariffs based on marginal cost. Although this paper does not cover all kinds of optional tariffs that are different from tariffs based on marginal cost, it shows the advantage of optional tariffs based on marginal cost and has important theoretical implications. The result of this paper also gives guide for channel coordination. Optional two-part tariff based on marginal cost can increase efficiency in channel coordination.

• 한국전자거래학회지
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• 제5권1호
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• pp.135-158
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• 2000

In recent years, many retail businesses jumped on the Internet auction bandwagon and paid substantially high fees to learn and develop proper business strategies for this new environment. Unlike what most businesses in the real world presume, this research shows that discriminatory-price ascending-bid auctions in a digital economy might be not very beneficial for the sellers on the Internet, if sellers sell the identical digital products through both a typical posted-price market and an auction. Using an extensive technology infrastructure along with suitable incentives and rules for market agents, we found that a discriminatory-price ascending-bid auction, which is the most popular auction mechanism on the Internet, serves consumers better than it does the sellers or producers in the digital economy. That is, the average prices for digital goods in these auctions are substantially lower than the prices in a posted-price market. This shows that it is not so wise for sellers to jump on the bandwagon of Internet auctions, if there is a market place with posted-price mechanisms which sells comparable items, or if a seller does not have special advantages or strategies in this new market institution. Electronic market mechanisms provide powerful means of understanding and measuring consumer characteristics including willingness-to-pay and other demographics for sellers or producers. Many concern that sellers may extract the entire surplus from the market by using customization on the Internet, thus consumers will be worse off in this digital economy. We found that these sellers who can customize their products and prices fail to capture the whole consumers surplus and cannot exercise a monopoly. One major explanation for this phenomenon is that the competition among the sellers prohibits them from charging prices according to customers demand for each product, where switching from one seller to another is not so difficult for the customers, and reselling products among the buyers are prohibited.

• 간호행정학회지
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• 제7권2호
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• pp.205-221
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• 2001

It will become more and more popular to use the long-term care facilities and home health care services with the chronic disease increasing. It depends on how much the consumers would pay and purchase the services. They might get more benefits from that kind of services than from ordinary hospitalization. So far, the study of determining the medical service price has focused most often on the efforts from the providers' view. But it must be reasonable to include the consumers' value for the service. This study was performed to assess WTP(Willingness to Pay) for home health care service in order to apply to the determination of nursing price in a reasonable manner. In this study, respondents were asked if they would pay for the service's intangible benefits under the four different types(open-ended minimum WTP, open-ended maximum WTP, bidding WTP, referendum WTP). The contingent valuation method is a potentially useful tool in understanding how people value the benefits of the service. As a result, average open-ended minimum WTP was W16,015 per day among 65 respondents. Average open-ended maximum WTP was W29,154 per day among 65 respondents. Average bidding WTP was W26,300 per day among 65 respondents. Average referendum WTP was W22,200 per day among 70 respondents. The results of regression analyses were also consistent with theoretical prediction, e.g., increasing WTP with consumers' value for the service, state of patients, and household income. This study demonstrated that it was more reasonable to consider the consumers' value in determining the services' price. In addition, a further study is needed to test the validity of this CV method and to determine a proper nursing price based on the consumers' view.

• 대한지리학회지
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• 제49권5호
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• pp.690-704
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• 2014

단독주택은 전통적인 인간의 주택 유형이다. 그럼에도 불구하고 이들 단독주택에 대한 관심이 적어 연구가 부족한 편에 속한다. 본 연구는 서울시에 소재하는 단독주택을 대상으로 분위회귀분석을 적용하여 가격형성요인을 분석하였다. 통상최소자승법의 경우 종속변수와 독립변수의 평균적인 관계를 파악하기 때문에 단독주택처럼 고가 주택과 저가 주택의 차이가 큰 경우에는 한계가 존재할 수 있다. 서울시 단독주택에 대한 분위회귀분석 결과 통상최소자승법의 유의미한 변수와 대체로 유사하였으며, 건폐율, 용도지역, 소재 지역, 경과연수, 지하층 유무, 고저, 형상이 도출되었다. 그러나 건폐율, 고저의 경우 저가 주택에서, 중가의 주택에서는 지하층 유무가, 고가 주택에서는 소재지역이 더욱 중요하다는 것을 알 수 있었다. 아울러 접근성은 단독주택에 유의미한 변수가 아니지만, 고가주택은 오히려 버스정류장과 멀어질수록 가격이 높아지는 것으로 나타났다. 강남지역에 대한 분석결과 건폐율과 접근성은 저가의 주택에 중요한 요인으로 작용한 반면, 고가의 주택에서는 녹지지역일수록 그리고 대중교통수단과 먼 지역일수록 가격이 높아지는 것을 알 수 있었다. 강북지역에서 건폐율 중요도는 모든 분위에서 일정하였으며, 용도지역이 강남지역보다 단독주택의 가겨에 영향을 많이 주지만, 상위 30% 주택에서는 통계적으로 유의한 차이가 없었다. 아울러 강북지역에서는 지하층 유무가 음의 영향을 주는 변수로 도출되었다. 그리고 경과연수의 경우 중 고가의 단독주택에 긍정적인 영향을 주었다. 서울시 및 강남 그리고 강북지역의 분석에서도 접근성 요인은 단독주택에 큰 영향을 주지 못하였다.