• 수산해양교육연구
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• 제28권6호
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• pp.1792-1800
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• 2016

This study is aimed to analyze the profitability of flatfish fry production farms in the Republic of Korea. The continuous and stable production of flatfish fries is one of important factors that increases the possibility of flatfish aquaculture's success. It is also the basis of aquaculture industry that estimates the quantity and quality of fishery products from aquaculture. Based on the surveyed data, production values and costs of flatfish fry production are estimated and compared to determine the profitability of flatfish fry production by farm. Results show that average return on sales of farms is 21.2%(12.4~26.3%), indicating that flatfish fry production would be profitable under the current production and market conditions. Sensitivity analyses of main variables (survival rate and selling price) indicate that the profitability of flatfish fry production farms can be significantly decreased when the survival rate and selling price would be slightly decreased.

• Asia pacific journal of information systems
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• 제20권3호
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• pp.33-49
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• 2010

We empirically examine the impact of online auction knowledge and category-specific knowledge on the final price of online auctions. Specifically, we question how the relationship between buying and selling experiences affects the final prices of online auctions. Related to the trust between buyers and sellers, we examine the multiple interactions between a buyer-seller pairand aim to identify how these repeated transactions influence the final price. To contrast these effects with other product related factors, we focus on so called 'common value' auctions of vintage stamps on eBay, in which the ex-post value of the product is the same among participating agents’ perceived value. Online auction of stamps provides a representative setting to examine the relationship between market experience and the auction participation behavior in the common value auction, as it provides the book value of stamp as well as price variation across individual buyers with different expertise levels. Our analysis of over 3000 stamps auctions on eBay indicates a significantly high frequency of buyer-seller (pair) interactions, thus suggesting a 'relationship view' of auctions. The work validates five hypotheses derived from the existing theory in economics, marketing, and information systems. Through the common-value auction data, we find that seller's online auction experience and category-specific experience favor sellers by increasing the final price. However, buyer's online auction experience does not affect the final price, but buyer's category-specific experience favors buyers by decreasing the final price. We find that the trust between two trading parties increases the final price.

• Industrial Engineering and Management Systems
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• 제8권1호
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• pp.1-13
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• 2009

This paper presents a coordinated planning model of price-dependent demand for a single-manufacturer and a single-retailer. The demand is assumed to be normally distributed, with its mean being price dependent. The manufacturer and retailer coordinate with each other to jointly and simultaneously determine the retail selling price and the retailer order quantity to maximize the joint expected total profit. This model is then compared to a 'returns' policy model where manufacturer buys back unsold items from the retailers. It is shown that the optimal total profit is higher for coordinated planning model than that for the returns policy model, in which the retail price is set by the retailer. A compensation or profit sharing scheme is then suggested and it is shown that the coordinated model with profit sharing yields a 'win-win' situation. Numerical results are presented to illustrate the profit patterns for both linear and nonlinear demand functions. The coordinated planning model, in addition, has a lower optimal price than for a returns policy model, which would result in higher sales, thus expanding the markets for the whole supply chain.

• Journal of the Korean Data and Information Science Society
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• 제28권4호
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• pp.819-829
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• 2017

가격의 추세가 형성되면 그 방향으로 진행하려는 price momentum 현상은 여러 국가의 거의 모든 주식, 채권 및 통화 시장에서 관찰되고 있다. KOSPI200선물을 대상으로 거래량 패턴과 일중 price momentum을 분석하였다. KOSPI200선물에서 장이 열릴 때와 닫힐 때 거래량이 집중되는 U자형 거래량 패턴이 관찰되었다. 9시 10분의 가격 수익률이 9시 시초가 대비 양 (+)이면 매수, 음 (-)이면 매도 진입하여 종가에 청산하는 전략의 유효성을 확인함으로써 일중 price momentum 현상이 존재함을 확인하였다. 또한, 9시부터 9시 10분까지 수익률이 점점 증가되는 J자형 가격 패턴 경우는 그렇지 않은 패턴 경우보다 price momentum 현상이 더 강함을 분석하였다. J자형 가격 패턴 여부를 판단하는 방법으로 DTW 분석 방식을 사용하였다. DTW 분석은 일중 가격 움직임을 예측하는데 유용함을 확인할 수 있었다.

• 한국산림과학회지
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• 제87권3호
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• pp.391-403
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• 1998

본 연구는 산림부산물인 고로쇠나무 수액 채취에서 판매에 이르기까지 전과정을 파악 분석하여, 수액이 산촌 주민의 지속적인 소득증대는 물론, 지역 사회에도 경제적으로 기여할 수 있는 지역 특산물로서의 기능을 극대화시킬 수 있는 방안을 모색하고자 현재 지역의 관행조사을 수행하였다. 조사는 1997년 1월 중순에서 2월 중순까지 약 l개월간에 걸쳐 실시하였으며, 조사대상지는 전라남도 고로쇠나무 수액의 주요 채취 지역인 구례군 토지면(지리산 피아골 지역)과 광양시 옥룡면(백운산 옥룡지역) 그리고 순천시 죽학리(조계산 선암사 지역)의 음용이용객이 많은 3개 지역을 선정하였다. 조사대상자는 각 지역별로 채취세대의 세대주를 임의로 30인씩 선정, 전체 90인을 직접적인 개별 면담을 통하여 설문을 실시하였다. 조사내용은 고로쇠나무 수액 채취에 관련한 관행 및 일반적인 사항, 수액의 가격별 판매현황, 수액의 판매경로, 수액의 채취 운반과 판매 노동력, 수액채취를 위한 운반거리와 운반수단, 수액판매에 따른 수액수업과 수액부대수입내역, 수액 채취세대의 수입현황 등이며, 조사자료는 지역별로 분석하였다. 조사 결과 고로쇠나무 수액 채취지역은 일정지역에 집중되어 있지 않고 분산되어 있으며, 각 지역별 각 마을별로 채취방법, 채취량, 판매방법, 판매가격 등의 제 조건이 상이하였다. 고로쇠나무 수액채취는 대부분의 지역에서 천공법을 채택하고 있으나 순천시는 사구법을 이용 채취하고 있었다. 수액의 채취량은 세대 평균 75말이었으나, 수액의 판매방법은 현지 음용에 의한 것과 외부 주문에 의한 판매가 각각 44%와 36%로 대부분을 차지하였다. 수액 18리터(1말)의 판매 가격은 6만원부터 l만원까지 다양하였으나, 평균 가격은 4.1만원이었으며, 4.3만원과 4.5만원에 판매된 수액이 각각 38%와 25%를 차지하였다.

• 한국산학기술학회논문지
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• 제13권8호
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• pp.3747-3756
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• 2012

본 연구는 민간택지 분양가상한제 시행이 아파트 분양가에 미치는 영향을 살펴본다. 본 연구에서 수행하려는 실증분석은 분양가상한제 적용 아파트와 분양가상한제 미적용 아파트를 사례대상으로 선정하여 분양가상한제 적용여부에 따른 분양가 구성요소 및 분양가를 비교분석하고, 부동산 관련 전문가를 대상으로 분양가상한제 시행이 분양가, 주택공급량 및 주택품질에 미치는 영향과 분양가상한제 존폐에 대한 인식을 파악하는 두 단계로 구성된다.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제16권1호
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• pp.72-80
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• 2016

Re-auction happens when a bid winner defaults on the payment without making second in-line purchase declaration even after determining sales permission. This is a process of selling under the court's authority. Re-auctioning contract price of real estate is largely influenced by the real estate business, real estate value, and the number of bidders. This paper is designed to establish a statistical model that deals with the number of bidders participating especially in apartment re-auctioning. For these, diverse factors are taken into consideration, including ratio of minimum sales value from the point of selling to re-auctioning, number of bidders at the time of selling, investment value of the real estate, and so forth. As an attempt to consider ambiguous and vague factors, this paper presents a comparatively vague concept of real estate and bidders as trapezoid fuzzy number. Two different methods based on the least squares estimation are applied to fuzzy regression model in this paper. The first method is the estimating method applying substitution after obtaining the estimators of regression coefficients, and the other method is to estimate directly from the estimating procedure without substitution. These methods are provided in application for re-auction data, and appropriate performance measure is also provided to compare the accuracies.

• 한국경영과학회지
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• 제35권4호
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• pp.17-31
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• 2010

This study investigates two-stage return policy and recycling issues in an e-marketplace supply chain consisting of consumers, a retailer and a manufacturer. The manufacturer, a focal company in the e-marketplace supply chain, considers the recycling of commercial returns so offers the retailer a buy-back contract of which transfer payment consists of a wholesale price and a buy-back price. Then, under the given contract offer, the retailer determines a selling price and a return policy to control consumers' demand and return requests. We consider the retailer's opportunistic behavior and supply chain coordination issues based on the principal-agent paradigm. We compare the first-best and second-best optima and conduct comparative static analyses to evaluate the performance results of the buy-back contract and provide important managerial implications.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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• pp.533-535
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• 2006

Cleaning robot that is selling in present city has various cleaning algorithm. However, error of most products happens on progress direction by small obstacle that do not properly and miss cleaning thereby happens. There is robot that correct own position, but is hard to use in general home because economical strain is very big because is high price product very. In this paper measures angular velocity of robot using deviation sensor, and do to correct error using turning angular velocity and vertical angular velocity. Because detailed cleaning such as high pice style is available without addition of expensive hardware in middle and low price style cleaning product thereby, can possess price competitive power.

• 대한산업공학회지
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• 제29권3호
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• pp.239-246
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• 2003

Individual items are produced continuously from an industrial process. Each item is checked to determine whether it satisfies a lower screening limit for the quality characteristic which is the weight of an expensive ingredient. If it does, it is sold at a regular price; if it does not, it is reprocessed or sold at a reduced price. The process mean may be adjusted to a higher value in order to reduce the proportion of the nonconforming items. Using a higher process mean, however, may result in a higher production cost. In this paper, the optimal process mean and lower screening limit are determined in situations where the probability that an item functions well is given by a logistic function of the quality characteristic. Profit models are constructed which involve four price/cost components; selling prices, cost from an accepted nonconforming item, and reprocessing and inspection costs. Methods of finding the optimal process mean and lower screening limit are presented and numerical examples are given.