Charles Ragin on “Dual Calibration”

Charles Ragin has published a research note on dual calibration, a heretofore undocumented function in the fs/QCA software. Dual calibration applies the direct method but uses four threshold values, allowing one to construct two fuzzy sets from a single variable, simultaneously calibrating “high-X versus not-high-X” and “low-X versus not-low-X.”

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