Dear Hafiz,

Methodological works on this topic include: 

• Anckar, Carsten. 2008. "On the Applicability of the Most Similar Systems Design and the Most Different Systems Design in Comparative Research." International Journal of Social Research Methodology 11: 389-401.
• Berg-Schlosser, Dirk, and Gisèle De Meur. 2009. "Comparative Research Design: Case and Variable Selection." In Configurational Comparative Methods: Qualitative Comparative Analysis (QCA) and Related Techniques, eds. Benoît Rihoux and Charles C. Ragin. London: Sage Publications. 19-32.

Applications can be found in, for instance:

• Haesebrouck, Tim. 2017. "EU Member State Participation in Military Operations: A Configurational Comparative Analysis." Cambridge Review of International Affairs. Advance online publication. DOI: 10.1080/09557571.2017.1313197.
• Pattyn, Valérie. 2014. "Why Organizations (Do Not) Evaluate? Explaining Evaluation Activity through the Lens of Configurational Comparative Methods." Evaluation 20: 348-67.

Best wishes,

Alrik

Thank you very much Thiem! I highly appreciate your help! 

You're welcome.

ALRIK

Thanks!