Comparative method is one of the oldest methods in the social science research. Nonetheless, its procedures are undergoing a continuing process of elaboration and sophistication. This paper initially attempts to explicate Ragin’s QCA (Quantitative Comparative Analysis) method and its application in social sciences. QCA is a new method for the comparative analysis in the historical, political and sociological arenas. Finally, Cronqvist’s MQCA (Multi-value Quantitative Comparative Analysis), as a more complicated version of Ragin’s QCA, will be discussed.
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