| 1. Introduction | 第1-22页 |
| ·Purpose and Scope of the Study | 第10-12页 |
| ·Literature Review | 第12-15页 |
| ·On some Basic Concepts | 第15-22页 |
| ·Conceptions of Democracy and the Role of the Mass Media Democracy | 第16-18页 |
| ·The First Amendment | 第18-22页 |
| 2. The Transformation of the Media Regulative Policies in America | 第22-29页 |
| ·The Rise of Regulation | 第22-24页 |
| ·The Change to Deregulation | 第24-27页 |
| ·News Coverage of the Telecommunication Act | 第27-29页 |
| 3. The Consequence of Deregulation: Media Concentration and Conglomeration | 第29-36页 |
| ·Horizontal Integration | 第31-33页 |
| ·Vertical Integration | 第33页 |
| ·Diagonal Integration | 第33-36页 |
| 4. Media Diversity and Democratic Dialogue | 第36-58页 |
| ·The Impact of Media Concentration on Media Diversity | 第36-52页 |
| ·The Problems of Corporate Control | 第37-47页 |
| ·The Influence of Advertisers | 第47-50页 |
| ·The Internet | 第50-52页 |
| ·The Impact of Media Concentration on Democratic Participation | 第52-58页 |
| 5. Conclusion | 第58-60页 |
| Bibliography | 第60-62页 |
