scalars(list) may be used to add other e()-scalars to the table footer (type ereturn list
to display a list of available e()-scalars after fitting a model; see help ereturn).
For example, scalars(df_m) would report the model degrees of freedom for each model.
list may be a simple list of names of e()-scalars, e.g.
. esttab, scalars(ll_0 ll chi2)
or, alternatively, a list of quoted name-label pairs, e.g.