Margit Tavits is an Associate Professor of Political Science at Washington University, St Louis. She is the author of Presidents with Prime Ministers: Do Direct Elections Matter? (2009).

• 1. Introduction; 2. Organizing for success: party organization and party performance; 3. Organizations at work: assessing the causal mechanisms; 4. Organizing for unity: organizational strength and parties in parliament; 5. Power within parties: the consequences of sub-unit organizational strength; 6. Environment, ideology, and leaders: why do some parties have strong and others weak organizations?; 7. Conclusion; Appendixes; References.

Margit Tavits is an Associate Professor of Political Science at Washington University, St Louis. She is the author of Presidents with Prime Ministers: Do Direct Elections Matter? (2009).

• 1. Introduction; 2. Organizing for success: party organization and party performance; 3. Organizations at work: assessing the causal mechanisms; 4. Organizing for unity: organizational strength and parties in parliament; 5. Power within parties: the consequences of sub-unit organizational strength; 6. Environment, ideology, and leaders: why do some parties have strong and others weak organizations?; 7. Conclusion; Appendixes; References.

Margit Tavits is an Associate Professor of Political Science at Washington University, St Louis. She is the author of Presidents with Prime Ministers: Do Direct Elections Matter? (2009).

• 1. Introduction; 2. Organizing for success: party organization and party performance; 3. Organizations at work: assessing the causal mechanisms; 4. Organizing for unity: organizational strength and parties in parliament; 5. Power within parties: the consequences of sub-unit organizational strength; 6. Environment, ideology, and leaders: why do some parties have strong and others weak organizations?; 7. Conclusion; Appendixes; References.