In re-calculation of Stata MCA command, for calculating "Quality of subspace" (or "overall quality" column in output) I use related formula in CA command which documented in page 54. of "STATA MULTIVARIATE STATISTICS REFERENCE MANUAL, RELEASE 16", but the result does not match Stata output. I think the "column Inertial" of Burt Matrix is not column-wise sum of Z^2. What is the correct formula?
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