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유진채,정윤희,공기서,Yoo, Jin-Chae,Jeong, Yun-Hee,Kong, Ki-Seo 한국유기농업학회 2009 韓國有機農業學會誌 Vol.17 No.2
This paper was to use choice experiments in the analysis of consumer choice behavior and preferences for five different attributes(the origin of rice, a quality certificate, a quality control, a traceability system, the price of rice) in Cheongju City. Completed surveys yielded 712 responses which were analyzed using the conditional logit model to analyze the marginal willingness to pay of the four attributes(the origin of rice, a quality certificate, a quality control and a traceability system) per household and estimated the marginal willingness to pay of the set of feasible options. The result of this study can be used as a guide for the rice industry in the design of possible labeling schemes.
유기농업의 공익기능에 대한 경제적 가치 평가 -실험선택법을 적용하여-
유진채,공기서,여순식,서명철,Yoo, Jin-Chae,Kong, Ki-Seo,Yeo, Sun-Sik,Seo, Myung-Chul 한국유기농업학회 2010 韓國有機農業學會誌 Vol.18 No.3
The objective of this paper is to apply choice experiment methods to estimate non-market value of organic farming and its policy implication. A preliminary survey shows that the attributes of organic farming are reduce environmental pollution, bio-diversity improvements, cultural diversity improvements and maintain local community, reduce green-house gas emissions, energy saving, landscape improvements and tax for organic farming improvement policy. Questionnaire was eight different choice sets presented to each respondent. Implicit values of the attributive levels of organic farming have been calculated into tax money costs per house. This paper compared the six feasible scenarios in terms of willingness to pay per year. This study is expected to contribute to government's organic farming policies and quantitative information related to practice of organic farming.
유진채(Jin-Chae Yoo),여순식(Sun-Sik Yeo),서상택(Sangtaek Seo) 한국농업경제학회 2015 農業經濟硏究 Vol.56 No.3
The objectives of this paper were to apply the choice experiment method to the analysis of consumer’s preferences and valuations for stalk end of watermelon and derived its policy implication. Focus group study and preliminary survey were conducted to specify the attributes of watermelon. Selected attributes of watermelon were types of stalk end, freshness, size, sugar content and consumer prices. The results of estimated implicit prices of the attributive levels showed higher preferences in the sugar content, freshness, types of stalk end and size of watermelon than those of baseline watermelon. The willingness to pays(WTP) or implicit prices for stalk ends were 3,460 won for T type of stalk end, 3,467 won for date label with no stalk end, 2,905 won for I type stalk end compared to no stalk end. The WTP of freshness level were 6,370 won for one day pass after harvest date , 6,300 won for 2~4 day pass after harvest date, -2,466 won for 7 day pass after harvest date compared to the baseline with 5~6 day pass after harvest date. These results were expected to contribute to government s agricultural policies and farmers’ decision makings with the practice of watermelon farming.
이중양분선택형 조건부 가치평가법에 의한 백두대간의 비시장적 가치 평가 - 충북도민조사를 중심으로 -
유진채(Jin-Chae Yoo),정대현(Daehyun Chung) 한국농어촌관광학회 2003 농어촌관광연구 Vol.10 No.1
The purpose of the paper was to estimate the non-market value of Baek-Du Mountains in Chungbuk Province using the double bounded contingent valuation method. The willingness to pay for conserving Baek-Du Mountains per household for one year in Chungbuk Province depended on the level of income and attitude of environmental conservation. The estimated mean of individual willingness to pay was 49,169 won.<br/> <br/>
유진채 ( Jin Chae Yoo ),여순식 ( Sun Sik Yeo ),공기서 ( Ki Seo Kong ) 한국축산경영학회,농업정책학회(구.한국축산경영학회) 2012 농업경영정책연구 Vol.39 No.2
The Biodiversity Management Contract Scheme (BMCS) designed for conserving and enhancing biodiversity and protecting winter birds` habitats in Korea and introduced as a payment for ecological service since year 2002. BMCS included partial rice harvesting practice, winter barley sowing practice, winter paddy irrigation practice and rice straw supply practice. The environment-friendly farming practice was not included in spite of feasibility study recommended. BMCS was effective for supply winter birds` feed but it had policy design limitation for increasing biodiversity and enhancing ecological service of agriculture. The policy effective survey results for stakeholders and administration stuffs were positive and affirmative. The affirmative rate had range between -5 and +5. Rice straw supply practice rate was highest and 4.13. Winter irrigation practice rate was second and 3.83. Winter sowing barley practice rate was third and 2.83. Partial rice harvesting practice rate was last and 2.13. The first rate of farm income increasing effects was winter irrigation practice and 2.58. The second rate was winter sowing barley practice and 1.88. The third rate was rice straw supply practice and 1.75. The last rate was Partial rice harvesting practice and 1.71.
Shapley Value를 이용한 안양천 유역 통합관리 계획에 따른 비용분담방안의 연구
송양훈 ( Yang Hoon Song ),유진채 ( Jin Chae Yoo ),공기서 ( Ki Seo Kong ),김미옥 ( Mi Ok Kim ),안소은 ( So Eun An ) 한국환경정책평가연구원 2010 환경정책연구 Vol.9 No.2
안양천은 서울의 한강에 유입되는 대표적 도시하천이다. 도시화로 인한 안양천 하천수질 악화와 건천화 문제를 개선하기 위해 유역통합관리를 위한 여러 사업이 진행되고 있다. 유역통합관리를 위해서는 관련 지자체들의 공조가 필요하게 되며, 재정분담문제가 필연적으로 발생하게 된다. 본 연구에서는 유역통합관리를 위해 제안된 사업비 261억의 4개 소유역의 비용분담 방안을 Shapley Value를 이용하여 제안하고 이를 다른 2개 분담방안들과 비교하였다. ‘분담방안 1’은 수질개선시설이 설치되는 유역의 지자체가 비용을 부담하는 방안으로, 소유역 I지역은 0.58%, 소유역 II지역은 29.54%, 소유역 IV지역은 0%, 그리고 소유역 V지역은 69.88%의 비용을 분담하게 된다. ‘분담방안 2’는 각 소유역의 소하천길이에 따라 비용을 분담하는 것으로, 13개 지자체들의 교섭력이 동일하다는 것을 전제로 하고 있으며, 소유역 I지역은 13.76%, II지역은 7.34%, IV지역은 45.87%, V지역은 33.03%의 분담을 해야 한다. 하지만 하천의 물 흐름은 상중하류의 각 지자체에 서로 다른 교섭력을 부여하므로, 공조적 게임의 解인 shapley Value를 이용하여 교섭력을 고려한 재정분담방안인 ‘분담방안 3’으로 비용분담체계를 설계하였다. 모든 가능한 공조체제에 있어 각 참여자들의 평균 한계기여도의 합으로 측정되는 Shapley Value에 의한 분담비율은 I지역 0.29%, II지역은 14.77%, IV지역 50.00%, V지역은 34.94%이며, 이를 지자체들이 수용 가능한, ‘공정한’ 재정분담방안으로 제시하였다. Anyang-cheon(stream) runs through southern metropolitan area of Seoul to Han-river in Korea. Due to fast growth of Seoul, the water quality and quantity problems in Anyang-cheon have occurred. To cope with the problems, the Integrated Watershed Management program for Anyang-cheon was adopted and a KRW 26.1 billion (USD 21.8 million) pilot project (construction of 4 facilities such as reservoir) is suggested for 4 sub-watersheds of Anyang-cheon, which cost will be shared by the 12 local governments (LG). Three cost division schemes are compared. By Scheme 1, if the cost is borne by the LG in a watershed where the facilities are constructed (no cost division scheme), the LG in I is to bear 0.58% of the total construction cost, LG in watershed II 29.54%, LG in IV 0%, LG in V 69.88%. In particular, LG in IV in this scheme bears no cost because no facility is constructed, even though watershed IV is the major beneficiary of the facility construction. Scheme 2 is to share the cost by length of streams in each sub-watershed and the suggested cost share for each sub-watershed is 13.76% by I, 7.34% by II, 45.87% by IV, and 33.03% by V. However, this cost division scheme is fair only under the false assumption that the bargaining powers of group of LGs are identical. To suggest a better and fair division rule, Shapley Value, a cooperative game solution, is used to suggest Scheme 3. In Scheme 3, Shapley Value measures the summation of average marginal contribution of each player in all possible coalitions as cost division scheme and is known to provide a fair division considering bargaining power. In the context of Anyang-cheon, LGs in upper stream have superior bargaining position. The result suggests the cost division is fair under Scheme 3, when the cost shares are 0.29% by I, 14.77% by II, 50% by IV, and 34.94% by V, respectively.
조건부 로짓 모델을 이용한 산림경관기능의 경제적 가치 평가
김의경 ( Eui Gyeong Kim ),김동현 ( Dong Hyeon Kim ),유진채 ( Jin Chae Yoo ),김미옥 ( Mi Ok Kim ) 한국산림과학회 2010 한국산림과학회지 Vol.99 No.6
The purpose of this study is to estimate economic value of forest landscape function using conditional logit model, applied by Choice Experiment. For the study, we have chosen attributes and levels of forest landscape. In specific, topographical forest type, forest type, forest density, recreational factor (side trip, accessibility of valley) and WTP were included in attributes. Based on factors, we have made 48 choice sets with Balanced and Orthogonal form using SAS 9.1. The efficiency of questionnaire was 6.02 (D-Error: 0.1) and choice set and socio-economic variable were selected. In order to reduce cognitive load of respondent, 96 choice sets were divided into 4 types in questionnaire so that respondent could respond to 12 choice sets respectively. Population was citizens from 7 metropolitan cities including Seoul, and the interview survey was conducted to find out average annual WTP per household for the total 280 interviewees. As a result, In the Non-ASC model, Mcfadden` ρ had 0.21, and Log Likelihood: -2,631. Average annual WTP per household for forest landscape was 266,723 Won(Korean currency).
1.5 양분선택형 질문법을 적용한 지역문화재의 가치추정: 청주 상당산성을 중심으로
정연정 ( Yeon Jung Jung ),공기서 ( Ki Seo Kong ),유진채 ( Jin Chae Yoo ) 한국지역개발학회 2010 韓國地域開發學會誌 Vol.22 No.1
The purpose of this study is to estimate the total economic value of the Sangdang mountain fortress in Cheongju city by Contingent Valuation Method. We surveyed 812 citizens were selected as samplesof the Sangdang Mountain Fortress beneficing in the resident Cheongju City and Chungwon County. We used the method of One-and-One-Half bound dichotomous-choice method to analyze the total economic value of the Sangdang mountain fortress per household. The one-and-one-half format provides less information than the double bound approach, but captures a large portion of the gain associated with moving from single bound to double bound. The range of willingness to pay about preservation and demobilization of the Sangdang mountain fortress is from 1,027 won to 3,405 won in the linear logit model.