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조재성 ( Jaesung Cho ),김용렬 ( Yonglyoul Kim ),김현중 ( Hyunjoong Kim ) 한국축산경영학회,농업정책학회(구 한국축산경영학회) 2020 농업경영정책연구 Vol.47 No.4
Infectious diseases in livestock cause serious problems not only in the livestock industry but also in many socio-economic aspects. Therefore, the Korean government allocates a significant amount of its budget to the national livestock health management policy annually. However, the effectiveness of the policy on the economic side has not yet been evaluated. Therefore, this study investigated the cost-effectiveness of the policy by using the loss-expenditure frontier method. The results show that from 2002 to 2018, the average efficiency of the policy was 0.716, with the maximum possible efficiency of 1. However, the median efficiency is low at 0.484, and the standard deviation is high at 0.28. This implies that the policy should be improved to equalize and increase its efficiency.
조재성 ( Jaesung Cho ),정세미 ( Semi Jeong ),배지윤 ( Baeji Yoon ),지인배 ( Inbae Ji ) 한국축산경영학회,농업정책학회(구 한국축산경영학회) 2018 농업경영정책연구 Vol.45 No.2
In Korea, the farm gate price of raw milk is determined by the price formula based on milk production cost. Total raw milk production at the national level is also heavily limited by the national quota system. Therefore, it is almost impossible to understand the status of raw milk market by observing raw milk price at the farm level or total supply of raw milk. This study develops an index to measure the imbalance of supply and demand of raw milk. To do this, we first analyzed the structure of raw milk market and then developed the milk market pressure index by applying the structure of the foreign exchange market pressure index. In addition, this study sets the seven market crisis stages using the average and standard deviation of the milk market pressure index and analyzed the main causes of the market crisis.
조재성(Jaesung Cho),박성진(Seongjin Park),김태후(Taehoo Kim),이형용(Hyungyong Lee),김현중(Hyunjoong Kim) 한국농식품정책학회 2019 농업경영정책연구 Vol.46 No.3
This study measures the fertilizer value of livestock manure and analyzes the impact of livestock manure management policy on the utilization of livestock manure as a resource. Fertilizer value of livestock manure was estimated using the amount of fertilizer components contained in livestock manure and the price of chemical fertilizer. The effect of the policy on the utilization of livestock manure was estimated using the seemingly unrelated regression technique and the system of linear equations representing the relations between livestock manure utilization and the government financial support(subsidy and loan). The result indicated that the average fertilizer value of livestock manure is about KRW 405 billion per year over the last five years (2013-2017). The increase in the financial support by KRW 100 million increased the amount of livestock manure utilized as a resource by 5,884 tons.
조재성 ( Jaesung Cho ),서강철 ( Gangcheol Seo ),김현중 ( Hyunjoong Kim ),김원태 ( Wontae Kim ),지인배 ( Inbae Ji ) 한국농업정책학회 2018 농업경영정책연구 Vol.45 No.3
In Korea, the number of companion animals, especially dogs and cats, is rapidly increasing mainly due to the increase in the number of nuclear families and single-person households. Nevertheless, only one study has explored the future market size of pet related industries by applying compound annual growth rate to the market size in 2012. The objectives of this study are to update the information on the market size of pet related industries and to estimate the potential market size in the future using a bass diffusion model. The results of this study indicated that a total of 9.32~9.97 million dogs and cats was estimated to live in Korean households as pets in 2018. This number will increase to 11.55~16.49 million in 2027. The market size of pet related industries in Korea was estimated to 1,544 billion KRW in 2018 and 3,498 billion KRW in 2027.
조재성(Jaesung Cho),서강철(Gangcheol Seo),지인배(Inbae Ji) 한국농식품정책학회 2019 농업경영정책연구 Vol.46 No.4
Since 2017, the Korean government has implemented the policy that restricts the production activity of selected duck farms in the nation and compensates for some of their economic loss due to the policy. This study analyzed the changes made in market equilibrium and social welfare due to the policy under various assumptions on the duck market situations. The results indicated that the policy reduced consumer, producer, and social surpluses by KRW 12 billion, 7.5 billion, and 19.5 billion, respectively. Also, social welfare will be significantly reduced if the policy is implemented during the period of AI outbreak. In this case, consumer, producer, and social surpluses decreased by KRW 21.8 billion, 15.2 billion, and 37 billion, respectively. Therefore, the policy should only be implemented in special circumstances and limit duck production at a minimum level.
이중차분법을 활용한 쇠고기 등급 기준 개편에 따른 한우 고급육 가격 변화 분석
조재성(Jaesung Cho),김현중(Hyunjoong Kim),정민국(Minkook Jeong) 한국농식품정책학회 2021 농업경영정책연구 Vol.48 No.2
Korea has been implementing a beef grading system consisting of quality and quantity grades since 1992. The quality grade consists of 1++ (highest), 1+, 1, 2, 3 (lowest) grades and is determined by marbling score (% fat content), meat color, fat color, texture, and maturity. The quantity grade consists of A, B, and C grades and is determined by back-fat thickness, eye muscle area, and carcass weight. The quality grade, mostly determined by the marbling score, is the key factor in determining the price of beef. This pricing mechanism has increased the production costs by breeding beef cattle for a long time to receive a quality grade 1 or higher. In addition, the recent trend of meat consumption in Korea is moving toward avoiding fat in the diet. Accordingly, the Korean government changed the beef grading system from December 1, 2019. In the new grading system, beef with a lower marbling score receives a higher quality grade than before. Therefore, the new system is expected to affect the price of beef, especially premium beef (a quality grade 1 or higher). This study analyzed the effect of changing the beef grading system on premium beef price. To do this, we applied DID (Differences in Differences) model to the wholesale price of beef. As a result, it was found that the real price of premium beef increased by 709~779 won per kg due to the change in the beef grading system.
CORBA기반의 이기종 데이터베이스 연동을 위한 공통 객체 서비스에 관한 연구
채지연(Jiyon Chae),한동파(Dongpa Han),조재성(Jaesung Cho),박순철(Sooncheol Park) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.2Ⅰ
분산 객체 미들웨어는 네트웍 투명성 이외에 여러 플랫폼 상에 존재하는 다양한 객체들을 하나로 묶을 수 있는 기능을 제공하기 때문에 이종의 플랫폼과 데이터 모델을 통합하는 시스템으로 자리잡아가고 있다. 본 연구의 목적은 네트워크에 분산되어 있는 서로 다른 데이터베이스들을 통합하는 통합환경 시스템을 설계하는데 있어서 필요한 서비스들을 연구하고 구현하은 것이다. 이를 위해서 이식성과 상호 운용 성이 뛰어난 분산 객체 시스템의 표준인 CORBA를 미들웨어로 설정하고 클라이언트 측은 JDBC를, 서버 측은 ODBC를 사용하여 통합 데이터베이스 모델을 설계하였다. 본 논문에서는 데이터베이스 통합에 있어 클라이언트와 구현객체 사이에서 구현될 CORBA서비스인 공통객체 서비스를 이용한다.