Contents: Introduction; 1. What is corruption and why does it matter?; Part I. Corruption as an Economic Problem: 2. Bureaucratic corruption; 3. Corruption in procurement and privatization; 4. Reducing incentives and increasing costs; 5. Civil service reform and bureaucratic reorganization; 6. Using the criminal law to deter bribery and extortion; Part II. Corruption as a Cultural Problem: 7. Culture and corruption; Part III. Corruption as a Political Problem: 8. Politics, corruption, and clientelism; 9. Organized crime, corruption, and money laundering; 10. Corruption in post-conflict state building; 11. Democracy: corruption, connections, and money in politics; 12. Accountability beyond the ballot box; Part IV. Reform Agendas - Domestic Political Will and International Influence: 13. Domestic conditions for reform; 14. The role of the international community; 15. The role of international cooperation: states, firms, banks, and organized crime; Part V. Conclusions: 16. Conclusions.