R (>= 3.0.0), grDevices, utils, car, sandwich
abind, colorspace, Hmisc (>= 4.1-0), MASS, e1071, foreign,
haven, readstata13, readxl, graphics, grDevices, stats, nortest
abind, colorspace, Hmisc, MASS, e1071, readxl, graphics,
grDevices, stats
abind, colorspace, Hmisc, MASS, e1071, foreign, haven,
readstata13, readxl, graphics, grDevices, stats, nortest
abind, colorspace, Hmisc (>= 4.1-0), MASS, e1071, foreign,
haven, readstata13, readxl, graphics, grDevices, stats,
nortest, lattice