why use cornish-fiber expansion instead of sample quantile? why use cornish expander what is the cornish-field expansion used for? why use the c-f expansion what is c-f expansion used for why use cornish-fisher expansion why use cornish-firer expansion in math why use the cornish fither expansion what is the difference between the c-f and the sample quantile why use the cornish-field expansion in empirical work? what is the difference between c-f and sample quantile what relates c-f sampling to sampling why use the cornish fisher expansion why use cf expansion instead of sample quantile why use cornish fither expansion instead of sample quantile why use the cornish fither expansion? why use the cornish-firer expansion instead of the sample quantile? why use the cornish-fier expansion instead of the sampling quantile? which expansion is better? sample quantile vs cornish fisher expansion why use a cornish flex expansion