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QCA (version 0.2-5)

Qualitative Comparative Analysis

Description

Performs the Quine-McCluskey algorithm for Qualitative Comparative Analysis, as described in Ragin, Charles C. 1987 "The Comparative Method. Moving beyond qualitative and quantitative strategies", Berkeley: University of California Press. It currently handles about 8 conditions and one outcome. While theoretically it could handle more conditions, it requires a lot of computer resources and is memory hungry; future versions will have more functions to address this problem, as well as functions for fuzzy-set QCA. The package doesn't currently handle missing values in the data, therefore it is not yet possible to perform simplifying assumptions

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Version

Install

install.packages('QCA')

Monthly Downloads

4,675

Version

0.2-5

License

GPL version 2 or newer

Maintainer

Adrian Dusa

Last Published

December 4th, 2024

Functions in QCA (0.2-5)

allExpressions

Create a matrix with all possible combinations of conditions
QCA-internal

Internal Functions
QCA-package

Qualitative Comparative Analysis
prettyString

Separate a very long vector of strings on several rows
prettyTable

Print a nicely formatted matrix or truth table
qmcc

Find a minimum solution in a boolean procedure, using the Quine-McCluskey algorithm
Osa

Political Opportunity in Non-democracies
createChart

Create the prime implicants chart
Rokkan

Divided Working-Class Movements
Ebbinghaus

Union Growth and Decline in Western Europe 1950-95
Yamasaki

The problem of contradictory simplifying assumptions
createMatrix

Create a base matrix for the truth table
readTosmana

Read Tosmana XML data file
createString

Create a vector of strings containing combinations of presence/absence of conditions
solveChart

Reduce the redundant prime implicants
Stokke

Causal mechanisms and regime effectiveness
truthTable

Create a truth table for crisp sets
factorize

Factorize a QCA solution