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| program reghdfe_footnote
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| syntax [, width(int 13)]
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| if (`"`e(absvars)'"' == "_cons") {
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| exit
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| }
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| tempname table
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| matrix `table' = e(dof_table)
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| mata: st_local("var_width", strofreal(max(strlen(st_matrixrowstripe("`table'")[., 2]))))
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| if (`var_width' > `width') loc width = `var_width'
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| loc rows = rowsof("`table'")
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| loc cols = rowsof("`table'")
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| local vars : rownames `table'
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| di as text _n "Absorbed degrees of freedom:"
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| tempname mytab
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| .`mytab' = ._tab.new, col(5) lmargin(0)
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| .`mytab'.width `width' | 12 12 14 1 |
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| .`mytab'.pad . 1 1 1 0
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| .`mytab'.numfmt . %9.0g %9.0g %9.0g .
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| .`mytab'.numcolor . text text result .
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| .`mytab'.sep, top
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| local explain_exact 0
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| local explain_nested 0
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| .`mytab'.titles "Absorbed FE" "Categories" " - Redundant" " = Num. Coefs" ""
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| .`mytab'.sep, middle
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| forval i = 1/`rows' {
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| local var : word `i' of `vars'
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| loc var = subinstr("`var'", "1.", "", .)
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| loc note " "
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| if (`=`table'[`i', 4]'==1) {
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| loc note "?"
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| loc explain_exact 1
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| }
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| if (`=`table'[`i', 5]'==1) {
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| loc note "*"
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| loc explain_nested 1
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| }
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| if (`rows'==1 & `=`table'[`i', 1]'==1 & strpos("`var'", "__")==1) loc var "_cons"
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| .`mytab'.row "`var'" `=`table'[`i', 1]' `=`table'[`i', 2]' `=`table'[`i', 3]' "`note'"
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| }
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| .`mytab'.sep, bottom
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| if (`explain_exact') di as text "? = number of redundant parameters may be higher"
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| if (`explain_nested') di as text `"* = FE nested within cluster; treated as redundant for DoF computation"'
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| end
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