Write a detailed research paper on three of the following topics: 

1. The nature of business ethics
2. Moral responsibility and blame
3. Utilitarianism
4. Rights and duties
5. Kantian theory
6. Justice theories
7. The ethics of care
8. Virtue theory
9. Morality and international business
10. Free market theory
11. Social Darwinism
12. Perfectly competitive markets and ethics
13. Competition typology
14. Oligopolies and public policy