The qvcalc package provides R functions to compute and display quasi-variances that often allow a more economical summary of the variance-covariance matrix for parameters in a statistical model.
Full package documentation, including version history, can be viewed at https://davidfirth.github.io/qvcalc .
For more details on the statistical method, see the references below.
To install the package from CRAN (in R):
install.packages("qvcalc")
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Firth, D. and Menezes, R. X. de (2004). Quasi-variances. Biometrika 91, 65–80. https://doi.org/10.1093/biomet/91.1.65
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Firth, D. (2003). Overcoming the reference category problem in the presentation of statistical models. Sociological Methodology 33, 1–18. https://doi.org/10.1111/j.0081-1750.2003.t01-1-00125.x