Lisa Müller received her PhD in Political Science from the University of Zurich, Switzerland, in 2012. Her research interests include democracy theory and measurement, comparative media research and political communication. She has published and taught in the field of comparative democracy research.

• 1. Introduction 2. Comparative Research on Media and Democracy PART I: ASSESSING DEMOCRATIC MEDIA PERFORMANCE 3. The Functions of the Media for Democracy 4. Measuring the Vertical and Horizontal Media Function 5. Comparing the Democratic Performance of Media Systems 6. Comparing the Democratic Performance of Media Content PART II: THE EFFECTS OF DIFFERENCES IN MEDIA PERFORMANCE 7. The Supposed Impact of Media on the Quality of Democracy 8. Media Systems and the Quality of Democracy: Testing the Link 9. Conclusion

Lisa Müller received her PhD in Political Science from the University of Zurich, Switzerland, in 2012. Her research interests include democracy theory and measurement, comparative media research and political communication. She has published and taught in the field of comparative democracy research.

• 1. Introduction 2. Comparative Research on Media and Democracy PART I: ASSESSING DEMOCRATIC MEDIA PERFORMANCE 3. The Functions of the Media for Democracy 4. Measuring the Vertical and Horizontal Media Function 5. Comparing the Democratic Performance of Media Systems 6. Comparing the Democratic Performance of Media Content PART II: THE EFFECTS OF DIFFERENCES IN MEDIA PERFORMANCE 7. The Supposed Impact of Media on the Quality of Democracy 8. Media Systems and the Quality of Democracy: Testing the Link 9. Conclusion