Comparative Public Administration is an important topic for the UPSC examination. It focuses on the study and comparison of public administration systems across different countries. To prepare comprehensively for this topic, you can follow the steps outlined below:

1. Understand the Basics:
- Begin by understanding the key concepts and principles of public administration.
- Familiarize yourself with the different approaches and theories in the field.
- Learn about the historical development of public administration in different countries.

2. Study Comparative Analysis:
- Develop a strong foundation in comparative analysis, which involves comparing and contrasting the administrative systems of different countries.
- Learn about the different methods and techniques used in comparative public administration.
- Understand the importance of context, culture, and socio-political factors in shaping administrative systems.

3. Comparative Administrative Structures:
- Study the administrative structures of different countries, including the hierarchy, division of powers, and coordination mechanisms.
- Compare the central, state, and local government structures in different countries.
- Analyze the role of bureaucracy in each administrative system.

4. Comparative Public Policy:
- Explore the policy-making processes in different countries.
- Study the formulation, implementation, and evaluation of public policies.
- Compare the approaches to policy-making and the role of various stakeholders in different countries.

5. Comparative Public Service:
- Study the recruitment, training, and career progression of public servants in different countries.
- Analyze the role of civil service commissions and merit-based systems in ensuring a competent and impartial bureaucracy.
- Compare the ethical standards and code of conduct for public servants in different countries.

6. Case Studies:
- Read case studies and comparative analyses of specific countries or regions.
- Analyze the successes and failures of different administrative systems.
- Identify best practices and lessons that can be applied in different contexts.

7. Current Affairs:
- Stay updated with the latest developments in public administration across the world.
- Read international news and journals to understand the challenges and reforms in different administrative systems.
- Analyze the impact of globalization and international organizations on public administration.

8. Practice Answer Writing:
- Regularly practice writing answers to previous year question papers and mock tests.
- Focus on developing a structured and analytical approach in your answers.
- Use examples and case studies to support your arguments.

Remember to refer to reliable study materials and resources such as textbooks, academic journals, and government publications. Regular revision and self-assessment are crucial for a comprehensive preparation.