• 한국멀티미디어학회논문지
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• 제25권2호
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• pp.157-165
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• 2022

As the stock market is affected by various circumstances including economic and political variables, predicting the stock market is considered a still open problem. When combined with corporate financial statement data analysis, which is used as fundamental analysis, and technical analysis with a short data generation cycle, there is a problem that the time domain does not match. Our proposed method, LSTE the operating profit and market outlook of a petrochemical company and estimates the sales and operating profit of the company, it was possible to solve the above-mentioned problems and improve the accuracy of stock price prediction. Extensive experiments on real-world stock data show that our method outperforms the 8.58% relative improvements on average w.r.t. accuracy.

• 대한한의학회지
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• 제17권2호
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• pp.34-47
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• 1996

전국민의료보험제도가 실시된 이후 의료 서비스에 대한 수요는 외래 진료와 입원진 모두 현저한 상승 현상을 보여주고 있다. 그러나 이에 반해 한방의료에 대한 수요는 한방의료보험제도의 부분적 시행에도 불구하고 상대적으로 저조한 실정이며, 의료시장에서의 점유율도 점차 감소하고 있는 추세에 있다. 따라서 한방의료를 국민 속으로 널리 확산시키고 양방의료에 대한 대체 기능을 제고시키려면 소비자들이 보다 쉽게 한방의료에 접근할 수 있는 장치가 마련되어야 하며, 그 중에서 가장 핵심적인 요소는 한방의료의 가격을 적정한 수준으로 유지하는 것이다. 본고에서는 한방의료기관이 현재의 경영 상태를 유지하면서도 한방의료의 대중화를 촉진시킬 수 있는 한방의료의 적정 가격을 추계하여 제시하였다. 본 연구 결과에 의하면 한방의료의 가격탄력성은 약 5.8로 높게 나타나 가격이 하락할 때 한방의료에 대한 수요가 그 이상으로 증가할 것으로 예상되어 전체적으로 경영수지는 호전될 것으로 추계되었다. 첩약가의 인하가 한방의료기관의 경영수지에 미치는 영향을 분석한 결과에 의하면 한의사의 추가공급에 별다른 제한이 없는 경우, 가격탄력성이 6일 때 첩약가를 20%, 40%, 50%씩 인하하면 수입이 각각 76%, 104%, 100% 증가하는 것으로 추계되었다. 또 가격탄력성이 5인 경우에는 수입이 각각 60%, 80%, 75% 증가하고, 가격탄력성이 4인 경우에는 수입이 각각 44%, 56%, 50% 증가하는 것으로 추계되었다. 그리고 이윤율을 첩약가 인하 이전인 50% 수준으로 유지하고자 할 때 최대로 가능한 첩약가의 인하 폭을 산정한 결과, (i)가격탄력성이 현재와 같이 6인 경우에는 최대 가격인하율이 33.3%이며, 이 때 첩약의 이용량은 200% 증가하고 수입은 2배가 되는 것으로 나타난다. (ii)가격탄력성이 5인 경우에는 가격을 30% 인하할 때 지금과 같은 이윤을 누릴 수 있으며, 이 때 한의원의 수입은 75% 증가하는 것으로 추정된다. (iii)가격탄력성이 4일 때의 최대 가격인하율은 25%로서 이 경우에 수입은 50% 증가하는 것으로 추정된다.

• 수산해양교육연구
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• 제28권1호
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• pp.198-210
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• 2016

This study firstly aims to estimate a leading-price of Jeju flounders with various price-classes by fish weight and secondly plans to provide policy implications of flounder purchase projects by understanding dynamic changes and interactions among flounder producer price-classes caused by price impulses in the market. This study applies an unit root test for stability of data, uses a Granger causality test to estimate the leading-price among producer prices by fish weight, employs the vector autoregressive model to analyze statistical impacts among t-1 variables used in models, and finally utilizes impulse response analyses and forecast error variance decomposition analyses to understand dynamic changes and interactions among change rates of the producer prices caused by price impulses in the market. The results of the study are as follows. Firstly, KPSS, PP, and ADF tests show that the change rate of Jeju flounder monthly producer prices by fish weight differentiated by logarithm is stable. Secondly, the Granger causality test presents that the change rate of the 1kg flounder producer price strongly leads it of 500g, 700g, and 2kg flounder producer prices respectively. Thirdly, the vector autoregressive model indicates that the change rate of the 1kg producer price in t-1 period statistically, significantly influences it of own weight in t period and also slightly affects price change rates of other weights in t period. Fourthly, the impulse response analysis indicates that impulse responses of structural shocks for the change rate of the 1kg producer price are relatively more powerful in its own weight and in other weights than shocks emanating from price change rates of other weights. Fifthly, the variance decomposition analysis points out that the change rate of the 1kg producer price is relatively more influential than it of 500g, 700g, and 2kg producer prices respectively. In conclusion, the change rate of the 1kg Jeju flounder producer price leads the change rates of other ones and Jeju purchase projects need to be targeted to the 1kg Jeju flounder producer price as the purchase project implemented in 2014.

• 산경연구논집
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• 제8권7호
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• pp.71-81
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• 2017

Purpose - The purpose of this study is to investigate the relationship between customer trust and intention to return to the traditional market by using empirical analysis. Research design, data, and methodology - For the empirical analysis of this study, questionnaires were conducted for adults and over 20s. A total of 200 questionnaires were distributed to consumers with experience in traditional markets, and 163 of them were used for empirical analysis. In order to analyze the relationship between customer trust and return visit intention by consumers visiting the traditional market, variables were selected through 10 constructive concepts and revised based on previous studies. The SPSS for win 18.0 was used for data analysis. Results - In order to clarify the relationship between consumer's visit to traditional market and customer's trust, it was found that the tolerance values of both the visiting factors and the consumers' perceptions of traditional markets were higher than .01. In the relationship between visitor's visit to traditional market and customer's trust, price was positively related to customer trust at 0.1% level. Image, product quality and freshness of traditional market were 5% Positive effects were found. These results show that consumers who visit traditional markets gain customer's trust in price, image, product quality and reliability of traditional market. Conclusions - In this study, the results of this study are as follows: First, the effect of customer trust on customer satisfaction is affected by the image (emotion) consumers feel about traditional market, the trust level about the price of goods offered by the market, The confidence level of freshness, the reliability of consumers' connection with the local economy, the consumer's traditional marketplace, and the level of awareness of the service (kindness) of the variables on the independent variables. As a result of the analysis, it was found that among the influence variables of customer trust used in this study, consumers had a high level of confidence about the price of commodities offered by the market, quality of goods, and freshness, The same relationship, market environment such as hygiene or cleanliness, connection with a local economy, service (kindness) of traditional market did not affect consumers' trust in traditional markets.

• 농업과학연구
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• 제45권4호
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• pp.859-870
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• 2018

Dried red peppers are a staple agricultural product used in Korean cuisine and as such, are an important aspect of agricultural producers' income. Correctly forecasting both their supply and demand situations and price is very important in terms of the producers' income and consumer price stability. The primary objective of this study was to compare the performance of time series forecasting models for dried red peppers in Korea. In this study, three models (an autoregressive model with exogenous variables [ARX], AR-exponential generalized autoregressive conditional heteroscedasticity [EGARCH], and ARX-EGARCH) are presented for forecasting the wholesale price of dried red peppers. As a result of the analysis, it was shown that the ARX model and ARX-EGARCH model, each of which adopt both the rolling window and the adding approach and use the agricultural cooperatives price as the exogenous variable, showed a better forecasting performance compared to the autoregressive model (AR)-EGARCH model. Based on the estimation methods and results, there was no significant difference in the accuracy of the estimation between the rolling window and adding approach. In the case of dried red peppers, there is limitation in building the price forecasting models with a market-structured approach. In this regard, estimating a forecasting model using only price data and identifying the forecast performance can be expected to complement the current pricing forecast model which relies on market shipments.

• 한국건설관리학회논문집
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• 제10권3호
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• pp.42-52
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• 2009

최근 수십 년 간, 전 세계적으로 주택 시장에서 주기적인 가격 상승과 하락이 반복되는 변동성의 양상이 나타남에 따라, 주택 정책 결정자는 시장 안정화에 가장 큰 초점을 두고 정책을 수립하고 있다. 특히, 2000년대의 주택가격 버블화 현상은 시장의 불안정성을 더욱 심화시키고 있다. 이에 따라 우리나라는 주택시장 안정화를 위한 방편으로 후분양제도 도입 및 분양가 상한제 확대 시행으로 대표되는 분양 제도 변화를 시도하고 있다. 그러나 정책 실효성에 대한 논란은 계속되고 있으며, 시장 참여자는 분양제도 변화에 따른 주택시장의 영향을 예측하는 데 있어 많은 어려움을 겪고 있다. 따라서 본 연구에서는 주택의 수요와 공급에 의해 결정되는 주택시장의 기본 원리를 바탕으로 시스템다이내믹스(System Dynamics)를 이용하여 주택시장 기본 모형을 구축하고자 한다. 또한 분양제도의 주요내용을 분석한 후 주택 시장 모형에 적용, 모형의 작동 방향을 분석함으로써 분양제도의 변화가 주택시장에 미치는 영향에 대해 밝히고자 한다.

• 산경연구논집
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• 제9권10호
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• pp.73-82
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• 2018

Purpose - Unstable vegetable prices have been one of the major concerns in Korean agricultural and food marketing system. The Korean government has implemented a number of policy instruments, including government purchasing programs in order to alleviate fluctuations in vegetable prices. The economic impact of policy instruments has been assessed based on the average monthly price change rate before and after the implementation of the policy. However, this approach failed to provide a net impact of policy measures on price stabilization in the vegetable markets, as policy impacts could not be successfully distinguished from other effects on price changes in the vegetable market. The purpose of this study is to evaluate the net impact of the government purchasing program on the price volatility of dried red pepper which is considered one of the major vegetables in Korea. Research design, data, and methodology - This study develops a monthly dynamic partial equilibrium model of Korean dried red pepper market. Behavioral equations in the model were estimated by OLS and synthetic method based on the annual and monthly time series data from 1993 to 2015. The model is first simulated to yield actual dried red pepper market conditions in 2015 as a baseline and then compared it to the scenario assuming that there were no government purchases of dried red pepper in 2015. Results - According to the ex-post scenario analysis using the developed model, without the government procurements in 2015, the average monthly price change rate and the value of coefficient of variation of dried red pepper in 2015 would be respectably 7.9 percent and 0.10. It is relatively higher than the actual average monthly price change rate and the value of coefficient of variation of dried red pepper in 2015 which were respectively 1.7 percent and 0.06. Conclusions - The ex-post simulation results in this study shows that if there were no government purchases of dried red pepper in 2015, the dried red pepper market would have had much higher volatile price movements. The results of this study would provide useful information for future price stabilization policy of vegetable markets in Korea.

• 수산경영론집
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• 제45권1호
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• pp.79-93
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• 2014

The Act on Distribution and Price Stabilization of Agricultural and Fisheries Product, which specifies rules and regulations on the trading system of fishery products wholesales markets, has been revised several times, mainly in order to improve the trading system. However, there is still a huge gap between the reality and law when it comes to the trading system of the fishery products wholesale market. This study aims to analyze the problems of the trading system of the fishery products wholesale market and to suggest ways to make improvement. The main problem facing the trading system of the fishery products wholesale market is sales on consignment by intermediate wholesalers, and this paper suggests two alternatives to solve the problem. First, intermediate wholesaler can be converted to market wholesalers, but it also entails other problems. The market wholesaler system has never been successfully adopted in the agricultural and fishery products wholesale market, and it is not clear which system is better between the wholesale market corporation and the market wholesaler system. Second, sales on consignment by intermediate wholesalers can be adopted with a positive view toward it. Negotiation transaction can be carried out for sales on consignment as a transaction method under the current Act on Distribution and Price Stabilization of Agricultural and Fisheries Products. However, since the act cannot provide a solution for listing, it is necessary to introduce Japan's negotiated transaction in advance system as a negotiation transaction method.

• 농업생명과학연구
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• 제44권6호
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• pp.201-211
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• 2010

이 논문은 한국 쇠고기 시장을 대상으로 도매 단계와 소매 단계에 초점을 맞추어 유통업자들의 시장지배력 정도를 측정하였다. 다양한 유통 채널상에 존재하는 가격들을 보면 유통비용 외에 추가적인 가격 차이가 있음을 보게 되는 데 이러한 비용을 넘는 가격 차이가 시장지배력을 보여주는 것으로 볼 수 있다. 연별 가격과 물량 자료를 이용하여 도매 단계와 소매 단계에서 유통상인들의 시장지배력을 측정하였다. 추정 결과를 보면, 소매단계는 완전경쟁에서 멀리 떨어져 있음을 알 수 있고, 도매단계는 상대적으로 완전경쟁에 가까운 것으로 나타났다.

• 문화기술의 융합
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• 제1권2호
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• pp.37-44
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• 2015

본 연구에서는 미술품의 경매 현황에 대해 알아보고 미술품 가격 지수의 국외 및 국내 현황에 대해 조사한다. 경매는 공개된 경쟁 입찰을 통해 미술품의 창작자로부터 수집가로 통하는 시장의 역할을 수행한다. 미술품의 사적 거래를 통한 음성적인 거래가 아직은 큰 부분을 차지하고 있는 국내 미술품 시장의 현황에서 경매의 역사는 짧지만 양성적인 거래인 경매에 의한 효과가 크기 때문에 앞으로는 경매가 더욱 활성화 할 것이다. 미술품 가격 지수는 선진국에서는 투자자들에 대한 투자 지침으로 역할하며 개발되어 잘 활용되고 있다. 그러나 아직 국내에서는 미술품 가격 지수에 대한 개발역사가 일천하며 개발된 미술품지수조차도 널리 활용이 되지 않고 있는 실정이다. 경매에서 낙찰된 작품들에 대해서만 가격정보가 투명하게 공개되므로 경매는 가격지수 개발을 위한 필수적인 토대라고 할 수 있다. 본 연구에서는 선진국과 국내 미술품 가격 지수에 대한 비교를 통해 한국형 미술품 가격지수들의 특징과 활용방안에 대해 검토한다.