Due to the biological characteristics of Korean beef cattle, the breeding period is long, so the number of breeding heads repeats increase and decrease. So they have a certain breeding cycle. In this study, we develop a model using a sine function that can reflect these characteristics of the Korean breeding cycle. Recently, the Korean beef cattle industry is undergoing structural changes such as scale-up, specialization, and increase in integrated breeding, and this has been reflected in the model. The explanatory power of the model was 0.92, which was very high, and the MAPE was 2.38%, indicating that the model had excellent predictive power. As a result of forecasting the number of Korean beef cattle, it is predicted that it will gradually increase from 3.4 million in 2021, reach the maximum level of about 3.85 million in 2026, and then decrease. The results of this study are expected to be useful for resolving the supply and demand instability in the Korean beef cattle market and the management risk of farms.

This study analyzes policy effects caused by providing additional insurance premium subsidy by local governments in addition to the central government. For this purpose we test whether insurance premium subsidy by local governments increases insurance participation rate and causes farmers to commit moral hazard through using two-way fixed effects model. The results show that insurance premium subsidy by local governments reduces the financial burden on farmers and encourages them to take up an insurance policy. However, excessive subsidy results in heavy fiscal burden and moral hazard committed by participants. Therefore, local governments need to provide differentiated subsidy rates considering production risk, loss rate, and participation rate for each individual agricultural item. Items with either higher loss rate or higher participation rate need to be lowered subsidy rate, which would contribute on sound fiscal management and stable insurance operation in the future.

This study will identify the problems in Gastrodia cultivation in Korea and China by taking the farmers in the main production area of Muju, Korea, and farmers in Yichang, China, where the conditions are similar to those in Muju, as the objects of the research, and then propose effective improvement strategies accordingly. In this process, a survey was conducted to analyze the income and costs of farmers, and the DEA analysis was applied to make a comparative analysis of the operational efficiency. The results of the analysis showed that, firstly, the average efficiency of all survey respondents was 94.1%, and the ineffectiveness was 5.9%. And eleven efficient farms in Korea and nine in China were derived by the BCC model. Secondly, the results of the comparative analysis of Korean and Chinese farmers' operations per 10a showed that the average input costs of Korean farmers accounted for 41.2% of the gross margin, while the average input costs of Chinese farmers accounted for 29.1% of the gross margin, indicating that Korean farmers' operations are much less efficient than those in China. Thirdly, it can be seen that there is a clear difference in the cultivation technology between Korea and China, with Korea producing 12.1 kg per ping compared to 58.8 kg in China, and Grastrodia production in China is 4.9 times higher than that of Korea. In the future, it will be necessary for Korea to switch cultivation methods, as China has done, and steadily raise productivity by adjusting the input factors of Grastrodia seed and seed culture that directly affect the yield of Grastrodia.

This study aims to measure whether climate change and abnormal climate affect agricultural product imports, focusing on tropical fruit crops. A panel gravity model based on import performance in the form of 'multiple origins to single destination' was constructed to analyze the fruit imports from major importing countries to Korea from 1996 to 2018. Methodologies verified in other previous studies, such as the panel tobit model proposed in the study, the panel Poisson model, and the Poisson pseudo-most likelihood estimation method, were used. As the increase in temperature at the origin had a negative effect on the import of tropical fruits in Korea, and the increase in precipitation at the origin also had a negative effect on the import of tropical fruits. The higher the intensity of the abnormal climate at the starting point, the more negatively the import of tropical fruits in Korea was. Among the natural disasters at the origin, drought negatively affected the import of tropical fruits, and the natural disasters at the rest of the origin did not significantly affect the imports of tropical fruits.

This study aimed to analyze the manage achievement and technical efficiency of mango farms. The Budget method for each crop, Data Envelopment Analysis (DEA), and bootstrap DEA are used for the analysis. In the case of efficiency is calculated through input-oriented CCR and BCC models. The data used for the analysis are results of an income survey conducted by visiting 19 mango farms. The main results are as follows. First, the total income is 30,885 thousand won, the management cost is 17,597 thousand won, and the income is 12,928 thousand won per unit (10a) of mango farms. Second, the average technical efficiency (TECRS) is 0.686. This means that 31.4% of the input factors are used inefficiently. Third, the average pure technology efficiency (PTEVRS) is 0.899, and the scale efficiency (SE) is 0.762. This means that 10.1% of the inefficiencies are caused by technology and 23.8% by scale. Forth, as a result of bootstrap DEA, the average bias of the CCR model is 0.185 and the BCC model is relatively low, 0.087. Fifth, most of the inefficient farms are producing in the area of increasing return to scale that can be expected to increase efficiency through scale expansion. Sixth, as a result of examining the scale and rate at which resources can be saved by benchmarking the reference group, the cost of establishing an orchard showed the highest saving rate with an average of 45.7%. On the other hand, the material cost, which has the lowest possible reduction ratio, is the largest, with an average of 15,229 thousand won.

This study estimates the willingness to pay (WTP) for Korean Geobong and Shine Musket and discusses the possibility of exporting them to Thailand. In the case of providing no information, the estimate of the average WTP for Korean Geobong is 731.8Bhat. With the information provided, it is 790.6Bhat, which increased to 58.8Bhat (8.0%). In the absence of information on Korean Shine Muscat, the estimate of the average WTP is 1,019.9Bhat. With the information given, it is 1,140.0Bhat, which increased to 120.1Bhat (11.8%). As the result of the changes in WTP by separating consumers from the awareness levels toward Korean Geobong and Shine Muscat, both show much information value in the low awareness group with the high awareness group compared. Based on the empirical results of this study, marketing strategies that provide information on Korean products could increase the Thai consumers' demand for Korean grapes.

Since the Free Trade Agreement (FTA) with the EU was signed in 2011, the domestic dairy market has become more open. As a result, imports of dairy products increased sharply and the domestic raw-milk self-sufficiency rate fell below 50%. Due to stagnating domestic demand for raw-milk caused by increasing imported dairy products, low birth rates, and environmental problems, the problem of oversupply of domestic raw-milk is emerging. The current price and quota system in domestic raw-milk market has many limitations in solving this supply and demand imbalance problem. In this study, this problem was approached from two aspects to solve the supply and demand imbalance facing the domestic dairy industry. As an approach to solving the problem, one is to look at the domestic dairy market from the perspective of supply and demand balance, and the other is to look at the asymmetric aspect of bargaining power due to the oligopolistic market structure. The approach to solving the problem has been summarized by improving supply and demand balance and competitiveness, compensating farmers' income, and resolving asymmetry in bargaining power for various issues currently discussed.