Economic Analysis of Japanese Dairy Herd Improvement Work and Genetic Information of Dairy Cow

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Using the data compiled by our project team which consisted of officially collected data from the farm and questionnaire surveys of dairy farmers, we carried out various approaches to achieve our goals according to the specialty of each team member. The following are the essence of the study results of each member :1) Concerning the characteristics of dairy herd information (hereafter referred to as DHI) and their value, the standard whereby information can be deemed valuable depends on the differences in the use of information between the information-supplier and information-taker. This means that DHI information is treated like a club or organizational asset.2) The level of utilization of DHI data depends on the balance between the benefits obtained from the available DHI data and expenses to be incurred by the members in order to procure such data. This finding enabled us to construct a framework of the demand and supply functions of dairy herd information.3) The inevitable occurren … More ce of uncertainty in the process of information treatment can be traced to the decision-making of member farmers and the necessary readjustment for time lag of information.4) The direct economic effect of information on production tends to be influenced by the replacement of dairy cows based on DHI information and adjustment by the method of opportunity benefit. The big discrepancy between these two methods prompted us to point out those aspects related to the use of DHI information that need to be improved.5) We also developed an econometric model which focuses on the technical level and knowledge of information utilization by dairy farmers in order to explain the optimal duration of milking cows.6) We also clarified the differences between the production behavior and speed of improvement of dairy cows between generalized dairy farmers and specialized breeding farmers. The importance of the process whereby information is generated and the places where data are obtained was pointed out. Less