CHAPTER 1 Introduction 1. Financial Incentives to Control Pharmaceutical Expenditures 2. Pharmaceutical Expenditures and Use of Therapeutic Agents in Korea 3. Research Purpose CHAPTER 2 Methods 1. Data 2. Analysis Model and Parameter Measurements 3. Statistical Analysis CHAPTER 3 Results 1. General Overview 2. Effects of Pharmaceutical Policy Changes on Drug Prescriptions CHAPTER 4 Discussion 1. Discussion on Methods 2. Discussion on Results 3. Limitations of This Study 4. Policy Implications and Tasks for the Future