酪農市場の現実的な経済現象を4つの実証的な分析をし、各分析は現在のNEIO枠組みを記述した。 Table of Contents Introduction Study Objectives Context of This Study Chapter 1　An Economic Evaluation of rbST Approval in Japan with Supply-Demand Model Reflecting Dairy Market Competitiveness Introduction Model Simulation Results Conclusions Chapter 2　Estimating Own and Cross Brand Price Elasticities and Price-Cost Margins of Fluid Milk Sales using Store-Level Daily Scanner Data Introduction Demand Model Price-Cost Margin Data and Model Estimation Results Conclusions Chapter 3　Explaining Dairy Firms' Pricing Conduct in Product-Differentiated Oligopoly: An Empirical Application of a Price Conjectural Variations Model Introduction Modeling Perceived Total Demand Elasticities Data Estimation Results Conclusions Analytical Note Chapter 4　Empirical Approach to Market Power in Bilateral Oligopoly: Estimating The Degree of Vertical and Horizontal Competition in Japan's Fluid Milk Markets Introduction Model Framework Empirical Model Data and Model Estimation Calculation of Market Power Parameters Conclusions Summary and Conclusions General Overview Future Works References