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• Qualitative_comparative_analysis abstract "Qualitative Comparative Analysis (QCA) is a technique, originally developed by Charles Ragin in 1987. QCA currently has more adherents in Europe than in the United States. It is used for analyzing data sets by listing and counting all the combinations of variables observed in the data set, and then applying the rules of logical inference to determine which descriptive inferences or implications the data supports.In the case of categorical variables, QCA begins by listing and counting all types of cases which occur, where each type of case is defined by its unique combination of values of its independent and dependent variables. For instance, if there were four categorical variables of interest, {A,B,C,D}, and A and B were dichotomous, C could take on five values, and D could take on three, then there would be 60 possible types of observations determined by the possible combinations of variables, not all of which would necessarily occur in real life. By counting the number of observations that exist for each of the 60 unique combination of variables, QCA can determine which descriptive inferences or implications are empirically supported by a data set. Thus, the input to QCA is a data set of any size, from small-N to large-N, and the output of QCA is a set of descriptive inferences or implications the data supports.In QCA's next step, inferential logic or boolean algebra is used to simplify or reduce the number of inferences to the minimum set of inferences supported by the data. This reduced set of inferences is termed the "prime implicants" by QCA adherents. For instance, if the presence of conditions A and B is always associated with the presence of a particular value of D, regardless of the observed value of C, then the value that C takes is irrelevant. Thus, all five inferences involving A and B and any of the five values of C may be replaced by the single descriptive inference "(A and B) implies the particular value of D".To establish that the prime implicants or descriptive inferences derived from the data by the QCA method are causal requires establishing the existence of causal mechanism using another method such as process tracing, formal logic, intervening variables, or established multidisciplinary knowledge. The method is used in social science and is based on the binary logic of Boolean algebra, and attempts to ensure that all possible combinations of variables that can be made across the cases under investigation are considered.".
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• Qualitative_comparative_analysis wikiPageWikiLink Category:Causal_inference.
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• Qualitative_comparative_analysis wikiPageWikiLinkText "Qualitative comparative analysis".
• Qualitative_comparative_analysis wikiPageWikiLinkText "comparative analysis".
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• Qualitative_comparative_analysis subject Category:Causal_inference.
• Qualitative_comparative_analysis subject Category:Social_science_methodology.
• Qualitative_comparative_analysis hypernym Technique.
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• Qualitative_comparative_analysis type Method.
• Qualitative_comparative_analysis type Science.
• Qualitative_comparative_analysis comment "Qualitative Comparative Analysis (QCA) is a technique, originally developed by Charles Ragin in 1987. QCA currently has more adherents in Europe than in the United States.".
• Qualitative_comparative_analysis label "Qualitative comparative analysis".
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• Qualitative_comparative_analysis sameAs Qualitative_Comparative_Analysis.
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