• 한국경영과학회지
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• 제31권4호
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• pp.105-123
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• 2006

Previous research on two-sided markets has, for the most part, concentrated on indirect network externalities between buyers alto sellers. This paper considers direct competition effect among sellers and among buyers as well as indirect network externalities. We develop an analytic model of C2C e-marketplaces and examine whether a monopolistic incumbent could successfully deter new entry into its market. We find that the effect of the number of sellers or buyers on the price of goods depends on whether sellers have decided to sell the goods using an auction or fixed pricing rule and on the characteristics of the goods. We argue that when the effect of the number of sellers on the price of goods is significantly larger than that of buyers, there is a high possibility of entry. In particular, we show that entry becomes more difficult to deter as fixed-price format is adopted more frequently or the proportion of collectables is relatively low.

• ETRI Journal
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• 제32권4호
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• pp.634-637
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• 2010

This letter presents a model for a dynamic collaboration (DC) platform among cloud providers (CPs) that prevents adverse business impacts, cloud vendor lock-in and violation of service level agreements with consumers, and also offers collaborative cloud services to consumers. We consider two major challenges. The first challenge is to find an appropriate market model in order to enable the DC platform. The second is to select suitable collaborative partners to provide services. We propose a novel combinatorial auction-based cloud market model that enables a DC platform among CPs. We also propose a new promising multi-objective optimization model to quantitatively evaluate the partners. Simulation experiments were conducted to verify both of the proposed models.

• 수산경영론집
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• 제5권1호
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• pp.9-42
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• 1974

Korea is a peninsular country surrounded by seas on three sides, and the fishing industry has carried out the service of suppling to the people with important anima protein. The distribution of fishery products has very complicated structures, because the production is in charge of small producers scattering along the coast all over the country, while consumpstion is made by separate homes in areas away from producing district. The relation between these two factors the structures make very complicated. The most typical and special structures of fishery distridution are distinguished in two, that is, one is landing market, the other is inland market. Landing markets have been monopolized by fishermen's cooperatives, providing with landing facilities and building sites. Fish markets played not only an important role in the landing, but distribution and price determination of catches by auction or tender. Inland markets are two types of wholesale market in consuming center, one is the terminal market for urban consumers, the other type is the local market for rural consumers. Fundamental functions of landing markets are gathering, assessment, and distribution functions. Gathering function is in charge of wholesaler in fishery cooperative. Gathering amounts are equal to gathering capacity of wholesaler and transact ability of licensed dealers as shown below model. Gathering amount=f.gathering capacity(=pre price.landing facility.account of wholesaler.distance of fishing ground.conveniency purchasing.home port)=fㆍ transact ability of licensed dealers≒f.population or port, and table 1 indicates these relationship. Assessment and distribution functions are in charge of licensed dealers in consumption side. Assessment function should bring the value in production activity through the auction between the cooperative seller and the licensed dealer as buyer. For fair trade transaction in auction, the free competition is supposed to be a prerequisite among the licensed dealers. The ideal condition for free competition is sameness in the scale of buying amount by licensed delaers, but it is almost impossible to attain its goal in actual marketing.

• 한국동물위생학회지
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• 제46권3호
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• pp.243-247
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• 2023

This study examined the dermatophytes of calves aged between 6 and 12 months in the Hanwoo calf auction market. Moreover, the research analyzed how dermatophytosis affected the auction price of Hanwoo calves based on their sex and age. The incidence rate of dermatophytosis was found to be 85 cases out of 1,955 calves (4.3%). The major location of dermatophytosis lesions were in the head region. Specifically, the highest prevalence was observed in the forehead (42.4%), followed by the eyes (30.1%), and the ears (18.8%). The auction prices of Hanwoo calves were observed that the average price for normal calves was 2,936,428 won, while calves with dermatophytosis were sold at 2,767,059 won. Comparing auction prices according to gender and age, it was observed that male calves and calves aged between 8 and 12 months had significantly lower auction prices compared to normal calves. The results provided valuable insights into the current situation of dermatophytosis in Hanwoo calves. Moreover, analyzing the impact of dermatophytosis on the auction prices of these calves, it has generated essential data that can serve as a foundation for implementing and enhancing ongoing management and prevention measures for dermatophytosis in cattle.

• 한국공간구조학회지
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• 제8권4호
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• pp.22-27
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• 2008

• 자원ㆍ환경경제연구
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• 제19권1호
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• pp.23-43
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• 2010

본 연구는 탄소배출권거래시 할당과 관련한 방법론 중 경매할당에 관한 연구로, 실험경제 방식을 이용하여, 가격결정방식간의 효율성을 비교하였다. 가격결정방식 중 단일가격 결정방식과 복수가격 결정방식에 대한 효율성을 비교하기에 앞서 무상할당, 일률배분 할당, 경매할당에 대한 배출권 가격분포를 분석함으로써, 경매할당이 불완전경쟁 체제하에서 시장수렴면에서 우월함을 입증하였다. Buckley et al.(2004) 연구에서 적용한 실험방식을 활용하여 거래상황을 설계하였으며, 실험결과, 단일가격 결정방식이 효율성 면에서 우월한 것으로 나타났다. 특히, 단일가격 결정방식은 시장참여자들이 승자의 저주(winner's curse)를 회피할 수 있기 때문에 시장참여자들이 보다 과감하게 입찰에 응함으로써, 배출권거래 운영자에게 한계저감비용에 대한 정보를 쉽게 노출시킨다는 점에서 거래운영을 용이하게 하는 이점이 있는 것으로 나타났다. 그러나, 경매수익 면에서는 단일가격 결정방식이 복수가격 결정방식보다 우월하다는 결론을 내리기에는 통계적 유의성이 확보되지 않았다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권9호
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• pp.4197-4219
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• 2017

Cloud computing is a new service to provide dynamic, scalable virtual resource services via the Internet. Cloud market is available to multiple cloud computing resource providers and users communicate with each other and participate in market transactions. However, since cloud computing is facing with more and more security issues, how to complete the allocation process effectively and securely become a problem urgently to be solved. In this paper, we firstly analyze the cloud resource allocation problem and propose a mathematic model based on combinatorial double auction. Secondly, we introduce a trust evaluation mechanism into our model and combine genetic algorithm with simulated annealing algorithm to increase the efficiency and security of cloud service. Finally, by doing the overall simulation, we prove that our model is highly effective in the allocation of cloud resources.

• 과학기술학연구
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• 제19권2호
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• pp.1-40
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• 2019

이 연구는 참여관찰과 심층인터뷰 등 문화기술지 연구방법을 통하여 양재화훼시장에서 이루어지는 전자경매거래의 물질문화를 분석하였다. 행위자-연결망 이론에 기초하여 중도매인 그리고 경매사와 같은 인간행위자와 시장기기(market devices)와 같은 인공물 간의 감각적, 물질적 상호작용이 어떻게 일어나며, 이를 통하여 그들 간의 네트워크, 즉 아장스망(agencement)이 어떻게 형성되는 지에 대해 분석하였다. 본 연구의 연구결과는 다음과 같다. 전자경매에 따른 새로운 시장기기의 출현으로 인하여 경매 퍼포먼스의 변화가 일어났다. 중도매인과 경매사 간 직접적인 상호작용은 축소되고 시장기기를 통한 간접적인 상호작용은 증가되면서 아장스망이 새롭게 형성되었다. 이러한 아장스망의 변화로 인하여 첫째, 젊은 중도매인 혹은 여성 중도매인의 경매 참여가 과거에 비해 보다 더 용이해졌다. 두 번째, 시장기기에 대한 경매참여자의 신뢰가 상대편 행위자에 대한 신뢰를 가져오고 결국 전자 경매에 대한 신뢰로 이어진다. 나아가 시장기기는 중도매인과 경매사간의 직접적인 상호작용을 줄임으로써 계층적이었던 중도매인과 경매사 간의 관계를 보다 동등한 관계로 변화시켰다. 마지막으로 거래 전광판은 경매사가 독점했던 거래현황정보를 중도매인들에게도 제공함으로써, 경매가격에 대한 경매사의 영향력은 보다 감소시켰고, 경매 라운드간 낙찰가격의 상관관계는 보다 증가되었다. 결국 시장 참여자들의 행위력, 권력, 신뢰 그리고 가격 및 정보들은 물질적이며 감각적이다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.149.3-149
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• 2001

Task allocation is a key problem in multiagent systems. The importance of automated negotiation protocols for solving the task allocation problem is increasing as a consequence of increased multi-agent applications. In this paper, we introduce the multiagent Traveling Salesman Problem(TSP) as an example of task reallocation problem, and suggest Vickery auction as an inter-agent coordination mechanism for solving this problem. In order to apply this market-based coordination mechanism into multiagent TSPs, we define the profit of each agent, the ultimate goal of negotiation, cities to be traded out through auctions, the bidding strategy, and the order of auctions. The primary advantage of such approach is that it can find an optimal task allocation ...

• 한국전자거래학회지
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• 제14권4호
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• pp.133-148
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• 2009

다수의 구매자와 판매자가 존재하는 경매분야에서 효율적인 협상에 대한 새로운 에이전트 협상방법론을 제시하였다. 경매문제를 게임이론으로 재 정의하고 이를 에이전트 협상에 적용하여, 온라인 티켓 재판매 시장 문제에 적용하였다. 본 에이전트를 적용한 결과 모든 구매자가 만족할 수 있는 내쉬균형을 보이고, 구매자와 판매자의 조합이 파레토 최적임을 보여주고 있다. 특히 본 에이전트 협상을 적용할 수 있는 새로운 비즈니스 모델을 수립하고, 에이전트 협상 진행 시 필요한 도메인과 프로세스를 온톨로지로 구현하였다.