MCA: Stata module to perform multiple correspondence analysis
The command mca produces numerical results as well as graphical representations for multiple correspondence analyses (MCA). mca actually conducts an adjusted simple correspondence analysis on the Burt matrix constructed with varlist (i.e. matrix of frequency counts resulting from all two-way cross-tabulations of the variables in varlist including the cross-tabulations of each variable with itself). It can be shown that the total inertia of the Burt matrix is high due to the fitting of the diagonal sub-matrices. Consequently, a simple correspondence analysis applied to this matrix usually results in maps of apparently poor quality. As a remedy, if not otherwise specified (see Options), mca adjusts the obtained principal inertias (eigenvalues) following a method suggested by Benzecri and presented in Greenacre (1984).
|Date of creation:||23 Feb 1998|
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