ROSALI-SIM/Modules/ado/plus/o/outreg2.hlp

{smcl}
{* 14nov2009}{...}
{cmd:help outreg2}

{hline}

{title:Title}

{p2colset 5 16 22 2}{...}
{p2col :{hi: outreg2} {hline 2}}Arrange regression, summary, and tabulation outputs into an illustrative table{p_end}
{p2colset 5 16 22 2}{...}
{p2col :{hi: {help seeout}} {hline 2}}Opens a tab-delimited table in the data browser{p_end}
{p2colset 5 18 24 2}{...}
{p2col :{hi: {help shellout}} {hline 2}}Opens documents and their programs from inside Stata{p_end}


{title:Examples}

    {help outreg2##s_0:0. Basic game plan}                  {help outreg2##s_11:11. Marginal Effects}
    {help outreg2##s_1:1. Prefix and bys( )}                {help outreg2##s_12:12. Word or Excel files}
    {help outreg2##s_2:2. Running loops}                    {help outreg2##s_13:13. TeX files}
    {help outreg2##s_3:3. Stored estimates}                 {help outreg2##s_14:14. Adding column titles or notes}
    {help outreg2##s_4:4. Shorthand}                        {help outreg2##s_15:15. n-way cross-tabulation}
    {help outreg2##s_5:5. Decimal places}                   {help outreg2##s_16:16. Group summary table}
    {help outreg2##s_6:6. Sideway display}                  {help outreg2##s_17:17. Fixed effects or legends}
    {help outreg2##s_7:7. Summary tables}                   {help outreg2##s_18:18. Insert r-class cmd( ) outputs}
    {help outreg2##s_8:8. Drop/keep/order variables}
    {help outreg2##s_9:9. Adding r( ) e( ) scalars}
    {help outreg2##s_10:10. Odds ratios and rrr}

{p 4 4 6}{help outreg2##s_Differences:Different versions of {cmdab:outreg} and {cmdab:outreg2}}

{p2colreset}{...}

{hline}

{marker s_Description}
{title:Description}

{p 4 4 6}
{cmd:outreg2} provides a fast and easy way to produce an illustrative table 
of regression outputs. The regression outputs are produced piecemeal and are 
difficult to compare without some type of rearrangement. {cmd:outreg2} 
automates this process by concatenating the successive regression ouputs in a 
vertical format. The resulting table is saved to the disk in ASCII 
format, which can be read by other programs.

{p 4 4 6}
{cmd:outreg2} thus facilitates the convertion of regression outputs to a standard 
format suitable for inclusion in a scholarly publication. The functionality of outreg2 
is based on the earlier package {help cmd:outreg}, by John Gallup. {help outreg2##s_Differences:Unlike} 
{cmd:outreg}, {cmd:outreg2} is capable of writing LaTeX-format tables, as well as ASCII, MS Word 
and MS Excel.

{p 4 4 6}
{cmd:outreg2} can report any regression output, provided it conforms to 
{it:the} {it:usual} {it:convention} for {help ereturn:ereturn list}. This includes 
most regression commands in Stata 7 or later. {cmd:outreg2} will report the latest regression output 
by default, or the list of {help estimates:stored estimates}. The ancillary statistics from from stored 
{help return} can also be accessed using {opt e( )} or {opt adds:tat( )}.

{p 4 4 6}
{cmd:outreg2} will also report the usual statistics such as standard error with the asterisks for the levels of 
significance (1%, 5%, and 10%), t-statistics, p-values, the number of observations, 
R-squareds, and the number of groups in a panel estimation. Standarized beta 
coefficients, exponentially transformed coefficients (i.e. odds/risk ratios 
or hazard rate). The user can add their own column titles with {opt ct:itle} and {opt addn:ote} options. 

{p 4 4 6}
An immediate access to the produced table is provided in the browser view with 
{opt see} option. {cmd:outreg2} also comes with automatically formatted number of 
significant digits, which avoids the awkward displays assoicated with the fixed 
format.


{hline}

{marker s_Syntax}
{title:Syntax}

{synopt: Full syntax:}{p_end}

{p 6 8 6}
{cmdab:outreg2} [{varlist}] [{cmd:[}{help estimates:{it:estlist}}{cmd:]}]
{helpb using} {it:filename} [{cmd:,} {it:options}] [{cmd::} {help estimation commands:{it:command}}] {p_end}

{synopt: Shorthand:}{p_end}

{p 6 8 6}
{cmdab:outreg2} [{varlist}] [{cmd:[}{help estimates:{it:estlist}}{cmd:]}] 
[{cmd:,} replace seeout] 
[{cmd::} {help estimation commands:{it:command}}] {p_end}

{p 4 4 6}
where {it:command} takes one of {help estimation commands}. The shorthand works 
only after a full syntax has been invoked.{p_end}

{p 4 6 2}
Note that {it:filename} must be enclosed within double quotes if it contains embedded spaces.{p_end}


{marker s_Options}
{title:Options}

{dlgtab:Main}

{phang}{opt replace} create a new file or overwrite the existing file.{p_end}

{phang}{opt see:out} display the regression table in the browser.{p_end}

{phang}{opt lab:el} replace variable names with variable labels.{p_end}

{phang}{cmd:label(insert)} insert labels next to variable names.{p_end}

{phang}{opt side:way} specify sideway display (with standard error next to coefficient). Use {opt paren( )} 
or {opt noparen} to control the location of parentheses.{p_end}

{phang}{opt o:necol} specify one column to display multiple equations. The default is one 
equation per column with the equation names separate from the variable names.{p_end}

{phang}{opt long} interweave the equation names into the same column 
with the variable names column. Combine it with {opt text} if you want a converted 
file in the text format as well. {p_end}

{phang}{opt ti:tle(list)} titles for your table; comma separated; use quotes for commas within a title. 
Titles can be added at any time. To erase your title, encase a space between quotes like this: title(" "){p_end}

{phang}{opt ct:itle(list)} column titles; comma separated for each additonal row; use quotes if comma is part of title. 
Example: ctitle("Wage, Participation","Wage: Participation"). To specify empty column title, specify 
ctitle(" ").{p_end}

{phang}{opt cttop(list)} place additonal column titles on the top; comma separated, use quotes for multiple column titles.{p_end}

{phang}{opt addn:ote(list)} add your own notes at the bottom. Must be specified in the first {cmd:outreg2} 
call when regression results are appended together. A blank line can be inserted by including "" as a note.{p_end}

{phang}{opt nonot:es} specifies that notes and legends explaining the standard errors, asterisks, etc., not be included.{p_end}


{dlgtab:Output Files}

{phang}{opt word} produces rich text file (rft) compatible with {cmd:MS Word}. The file conversion can be 
specified at any time (you should do it with the last appedning). The existing file must not be open for 
it to be written over.{p_end}

{phang}{opt excel} specifies an xml, xls, xlm, or cvs file compatible with a standard spreadsheet 
like {cmd:MS Excel}. Any existing file with the same name must be closed to have it 
replace with a new file.{p_end}

{phang}{opt text} produces plain text file exactly. {opt long} or {opt label} will 
sometimes cause the main output text file to be different from what might be 
expected. Use this option to obtain exactly specified text file.{p_end}

{phang}{opt tex} produces a stand-alone LaTeX compatible files suitable for loading into a TeX typesetting program 
such as Scientific Word.{p_end}

{phang}{cmd:tex( )} takes the following options for tex:{p_end}

{p 8}    {cmd:{ul:frag}}ment - a TeX fragment for inclusion in a larger document{p_end}
{p 8}    {cmd:{ul:pr}}etty - with some italics and varying font sizes{p_end}
{p 8}    {cmd:{ul:land}}scape - horizontally{p_end}

{phang}{opt quote} specifies quotation marks to encase each observation, which can 
be helpful for reading the output file in other software.  See the {opt noquote} 
option in {help outsheet} for more details (all the output of {cmd:outreg2} comes 
from string variables). {opt quote} may cause problems appending tables together. {p_end}

{phang}{opt comma} specifies that the ASCII file output be separated by commas 
rather than by tabs. This can cause problems if any of the user-defined text has 
commas in it (such as variable labels, {opt ct:itle}, {opt adds:tat}, or 
{opt addn:ote}). If that is the case, consider using {opt quote} as well. {p_end}


{dlgtab:Auxiliary Statistics (for each variable)}

{phang}{opt st:ats( )} contains statistics to be reported per variable, the default is 
{cmd:stats(coef se)}. Space- or comma-delimited. Restricted to the estimation sample (single equation). Choose 
in any order or frequency from these:
        
        {ul:regression}
           coef      se        tstat     pval      ci       ci_low
           ci_high   aster     beta     
           
        {ul:summary}
           N         sum_w     mean      Var       sd        sum       
           min       max       skewness  kurtosis  p1        p5        
           p10       p25       p50       p75       p90       p95       
           p99       
           
        {ul:correlations}
           corr      pwcorr    spearman
           
        {ul:string}
           blank
           str({it:str}) where {it:str} is any string or numeric expression
           
        {ul:command}
           cmd({it:macro}:{it:cmd}) where {it:macro} is to be produced by any {help outreg2##s_18:{it:cmd}}
           cmd({it:r( )}:{it:cmd}) where {it:r( )} is to be produced by any r-class {help outreg2##s_18:{it:cmd}}
           
           
{phang}{opt nose} specifies no standard error; only coefficients are reported {p_end}

{phang}{opt l:evel(integer)} specifies the confidence level, in percent, for 
confidence intervals. The default is {opt level(95)} or as set by {help set level}, 
{opt l:evel} does not affect the confidence levels of asterisks. {p_end}

{phang}{opt ef:orm} the exponentiated form of the coefficients be reported. This corresponds to {opt or} option for 
{help logit}, {help clogit}, and {help glogit} estimation,  {opt irr} for {help poisson} estimation, {opt rrr} 
for {help mlogit}, {opt hr} for {help cox} and {help stcox} hazard models, and 
{opt eform} for {help xtgee}. The default form of {help stcox} is the hazard rate form; use the {opt eform} to report it. {p_end}

{phang}{opt nocon:s} specifies that the intercept (constant) be not reported.{p_end}

{phang}{opt noni} specifies that the number of groups in a panel data regression 
not be reported (e.g. the number of groups specified by the i( ) variable in {help xtreg}).{p_end}


{phang}{ul:Assuming only 2 statistics reported per variable:}{p_end}

{phang}{opt tstat} t-statistics rather than standard errors are reported. The decimal places displayed are set 
by {opt auto( )} or {opt tdec}.{p_end}

{phang}{opt pvalue} specifies that p-values (of t-statistics) rather than 
standard errors are reported. The decimal places displayed are set by {opt auto( )} or {opt pdec}. {p_end}

{phang}{opt ci} specifies that confidence intervals of coefficients rather than 
standard error are reported. The decimal places displayed are those set by {opt auto( )} or {opt cdec}. {p_end}

{phang}{opt be:ta} asks that normalized beta coefficients be reported rather than 
standard errors (see the beta option of {help regress}). The decimal places 
displayed are those set by {opt auto( )} or {opt bdec}.{p_end}


{dlgtab:Ancillary Statistics (for each regression)}

{phang}{help ereturn:{opt e(scalars)} }report {help ereturn:e-class scalars} at the bottom of the table. 
They may be requested individually, as in {cmd:e(N ll r2)}, or for all, by specifying {cmd:e(all)}. 
The reported e-class statistics are automatically formated by auto-digits, unless {opt ade:c} 
has been specified for it. {p_end}

{phang}{opt adds:tat(list)} access {help ereturns:e-class}, {help return:r-class}, {help sreturn:s-class} 
scalar statistics, or just plain numbers in new rows below the R-squared (if shown). Comma separted. 
The user must specify both a name and a value for the statistic. Users can report significance levels 
of test statistics as a second statistic to be shown on the line below the first statistic 
(see example below). {p_end}

{phang}{opt addtext(list)} specifies user-added text (including 
numbers) to be displayed in new lines below the R-squared (if shown). Unlike {opt adds:tat}, 
{opt addt:ext} will not format numbers nor try to interpret any e-class text (such as e(N) or e(title), which 
{opt adds:tat} will translate into the number of observations or title). {p_end}

{phang}{opt nor:2} specifies that no R-squared (or adjusted R-squared) be reported.{p_end}

{phang}{opt ad:jr2} specifies that the adjusted R-squared be reported rather than the regular R-squared 
when available.{p_end}

{phang}{opt noobs} specifies no number of observations is to be reported.{p_end}


{dlgtab:Equations and Variables}

{phang}{opt drop(varlist)} Do not report these variables. Do not include the dependent variable in this list.{p_end}

{phang}{opt keep(varlist)} Keep and report these variables. {p_end}

{phang}{opt eqdrop(eqlist)} Drop these equations from the table {p_end}

{phang}{opt eqkeep(eqlist)} Keep and report these equations. {p_end}

{phang}{opt sortvar(varlist)} Sort and order variables; non-existent variable names are ignored.{p_end}

{phang}{opt groupvar(names)} Sort and order variable; non-existent names are inserted as super-rows or row-heading.{p_end}


{dlgtab:Displays}

{phang}{opt par:enthesis( )} specifies parenthesis ( ) to be placed around any/many of these: 
coef se tstat pval ci ci_low ci_high aster blank. Can be used with {opt br:acket( )}.{p_end}

{phang}{opt nopa:ren} specifies no parentheses be placed around standard 
errors, t-statistics, standard errors, etc. {p_end}

{phang}{opt br:acket} specifies square brackets [ ] be used rather than 
parentheses ( ) around standard errors, t-statistics, etc. {p_end}

{phang}{opt br:acket( )} specifies square brackets [ ] to be placed around any/many of these: 
of these: coef se tstat pval ci ci_low ci_high aster blank. Can be used with {opt par:enthesis( )}.{p_end}

{phang}{opt alpha(numlist)} specifies the levels of significance, separated by comma 
from the most significant to the least signficiant. Example: {opt alpha(0.001, 0.01, 0.05)}. Up to 3 are automatically 
assigned asterisks. If more than 3 levels are defined, then the symbols must be specified with {opt sym:bol(text)}. {p_end}

{phang}{opt sym:bol(text)} specifies symbols for the levels of significance from the most significant 
to the least significant, the default {opt sym:bol(***, **, *)}.{p_end}

{p 8 8 12}They will assigned the significance levels of 0.01, 0.05, and 0.10 
automatically in that order. If more than 3 symbols are assigned, then the same number of levels of significance must be specified using 
{opt alpha}.{p_end}

{phang}{opt aster:isk( )} specifies asterisks to be placed around some 
of these: coef se tstat pval ci ci_low ci_high blank. {p_end}

{phang}{opt noas:ter} no asterisks denoting statistical significance 
levels be reported. {p_end}

{phang}{opt 2aster} specifies 2 asterisks for 1% and 1 asterisk for 5%. 
The default is 3 asterisks for 1%, 2 asterisks for 5%, and 1 asterisk for 10%. {p_end}

{phang}{opt 10pct} equivalent to {opt sym:bol(**, *, +)}{p_end}


{dlgtab:Decimals and Formats}

{phang}{opt auto(integer)} the number of automatically formatted decimals, the default is {cmd:auto(3)}, 
i.e. three significant digits not counting the ones (i.e. the digit to the left of the decimal point). 
This means 1.234 and 0.123 might be displayed, while 12.345 or 0.1234 will be trimmed.

{p 8 8 12}A probable integer is reported without decimals. A very large or small number will be displayed in 
exponential format. Specify {opt dec( )} or {opt bd:ec( )} to disable it. {p_end}

{phang}{opt less(integer)} specifies how many less significant digits to be 
displayed for the auxiliary (non-coefficient) statistics. The default is {cmd:less(0)}, meaning no less.{p_end}


{phang}{ul:fixed decimals}{p_end}

{p 8}{opt dec(#)} fixed decimals for everything, default dec(3){p_end}

{p 11}    between 0 and 11, inclusive{p_end}

{p 8}{opt bd:ec( )} for coefficient{p_end}
{p 8}{opt sd:ec( )} for standard error{p_end}
{p 8}{opt td:ec( )} for t-statistics{p_end}
{p 8}{opt pd:ec( )} for p-value{p_end}
{p 8}{opt cd:ec( )} for confidence intervals{p_end}
{p 8}{opt rd:ec( )} for r-square{p_end}
{p 8}{opt ad:ec( )} for addstat( ) numerals{p_end}


{phang}{ul:fixed format}{p_end}

{p 8}{opt fmt(type)} format for everything, default fmt(fc){p_end}

{p 11}     e        - scientific notation; e.g. 1.00e+3 {p_end}
{p 11}     f or fc  - fixed format (with commas for thousands with fc){p_end}
{p 11}     g or gc  - general format (with commas for thousands with gc)

{p 8}{opt bf:mt( )} coefficient{p_end}
{p 8}{opt sf:mt( )} standard error{p_end}
{p 8}{opt tf:mt( )} t-statistics{p_end}
{p 8}{opt pf:mt( )} p-value{p_end}
{p 8}{opt cf:mt( )} confidence intervals{p_end}
{p 8}{opt rf:mt( )} r-square{p_end}
{p 8}{opt af:mt( )} addstat( ) numerals{p_end}


{dlgtab:Marginal effects}

{phang}{opt mfx} reports marginal effects as computed by {help mfx}. It will reported marginal 
effects instead of estiamted coefficients. {p_end}

{phang}{opt m:argin(u|c|p)} the unconditional, conditional, and probability marginal 
effects for {help truncreg}, {net_d:marginal} from STB 52, or {net_d:dtobit} from STB 56. 
One of u, c, or p is required after {net_d:dtobit}, corresponding to the unconditional, 
conditional, and probability marginal effects, respectively. It is not necessary to specify 
{opt margin} after {help dprobit}, {net_d:dlogit2}, {net_d:dprobit2}, or {net_d:dmlogit2}.{p_end}


{dlgtab:Summary Statistics}

{phang}{opt sum} summary be reported after a regression command, restricted to the estimation sample, i.e. e(sample)==1, 
unless no regress exists or {opt raw} option specified. This is the same as {cmd:stats(mean sd)}.{p_end}

{phang}{opt raw} do not restrict the sample to e(sample) or perform casewise dropping. Currently works only with sum. 
The number of observation reported is the maximum.{p_end}

{phang}{opt sum(log)} summary table just like the one from log file. Default is raw (no casewise dropping). 
Use eqdrop() or eqkeep() to get what you want.{p_end}

{phang}{opt sum(detail)} detailed summary table.  Default is raw (no casewise dropping). 
Use eqdrop() or eqkeep() to get what you want.{p_end}


{dlgtab:Tabulations}

{phang}{opt cross:tab} n-way cross-tabulation. Varlist is required. The first 
variable must be counting numbers, i.e. 0, 1, 2, etc., and the rest must be non-strings. See {help outreg2##s_15:example} below. {p_end}


{dlgtab:Rarely Used}

{phang}{opt slow(#)} A milli-second delay. Specify slow(100) or larger if you are using a laptop with a throttled 
harddrive that runs too slowly, causing "could not be openend r(603)" error.{p_end}


{hline}

{marker s_0}
{title:Example 0. Basic game plan}

{p 4 4 6}You should specify the current directory where all the files will be stored. 
Alternatively, you can specify the complete pathway from within {cmd:outreg2}, but you must 
encase it with quotations marks.{p_end}

{p 4 4 6}{stata "cd c:\"}{p_end}
{p 4 4 6}{stata sysuse auto,clear}{p_end}
{p 4 4 6}{stata regress mpg foreign weight headroom trunk length turn displacement}{p_end}
{p 4 4 6}{stata outreg2 using myfile, replace cttop(full)}{p_end}
{p 4 4 6}{stata regress mpg foreign weight headroom}{p_end}
{p 4 4 6}{stata outreg2 using myfile, see}{p_end}

{p 4 4 6}You can immedicately see the changes. The variable "weight" loses some of its significance 
in the full specification. The estimated effect of weight can be shown to be downward-biased from 
-0.00420 to -0.00647 by omitting a number of covariates. This is an easy way to check for 
collinearity and misspecification.{p_end}

{p 4 4 6}You can use {cmd:e( )} or {cmd:addstat( )} option to augment the standard 
regression results with other e-class statistics (scalar only). {cmd:addstat} can handle 
r-class and s-class results as well, if they exist. The following codes are equivalent 
excpet in appearance.{p_end}

{p 4 4 6}{stata outreg2 using myfile, e(r2 ll)}{p_end}
{p 4 4 6}{stata outreg2 using myfile, addstat(R-squared by hand, e(r2), Log Lik, e(ll))}{p_end}

{p 4 4 6}If you want to see everything available in the e-class, do it like this:{p_end}

{p 4 4 6}{stata outreg2 using myfile, e(all)}{p_end}


{marker s_1}
{title:Example 1. Prefix and bys( )}


{p 4 4 6}{cmd:outreg2} can be used in as a prfix.{p_end}

{p 4 4 6}{stata sysuse auto, clear}{p_end}
{p 4 4 6}{stata "outreg2 using myfile, replace ti(Car stuff): reg price mpg weight turn"}{p_end}
{p 4 4 6}{stata "outreg2 using myfile, see excel: reg price mpg weight turn if price > 6100"}{p_end}

{p 4 4 6}It is also byable with bys( ) prefix.{p_end}

{p 4 4 6}{stata "bys foreign: outreg2 using myfile, side replace see: reg rep78 head weight gear len [aw=mpg]"}{p_end}


{marker s_2}
{title:Example 2. Running loops}


{p 4 4 6}Because this involves a loop, you must copy and paste into a do-file:

{p 4 4 6}sysuse auto,clear{p_end}
{p 4 4 6}cap erase myfile.txt{p_end}
{p 4 4 6}forval num=0/1 {{p_end}
{p 8 8 6}regress mpg weight headroom if foreign==`num'{p_end}
{p 8 8 6}outreg2 using myfile{p_end}
{p 4 4 6}}{p_end}
{p 4 4 6}seeout{p_end}


{marker s_3}
{title:Example 3. Stored estimates}


{p 4 4 6}You can automatically recall the stored estimates by specifying them from 
within {cmd:outreg2}. To distinguish them from the varlist, place the estlist 
within a pair of {cmd:[}square brackets{cmd:]}.{p_end}

{p 4 4 6}{stata sysuse auto,clear}{p_end}
{p 4 4 6}{stata regress mpg foreign weight headroom trunk length turn displacement}{p_end}

{p 4 4 6}{stata estimates store Full}{p_end}
{p 4 4 6}{stata regress mpg foreign weight headroom}{p_end}

{p 4 4 6}{stata estimates store Restricted1}{p_end}
{p 4 4 6}{stata regress mpg foreign weight}{p_end}

{p 4 4 6}{stata estimates store Restricted2}{p_end}
{p 4 4 6}{stata outreg2 [Full Restricted1 Restricted2] using myfile, replace see}{p_end}

{p 4 4 6}{cmd:outreg2} will take the stored estimates as wildcards (*). Try this:

{p 4 4 6}{stata outreg2 [*] using myfile, see replace}{p_end}
{p 4 4 6}{stata outreg2 [R*] using myfile, see replace}{p_end}

{p 4 4 6}The varlist may be combined with the estlist. The varlist will take the 
wildcards as well, provided they exist in the estlist.{p_end}

{p 4 4 6}{stata outreg2 foreign weight [*] using myfile, see replace}{p_end}

{p 4 4 6}If you are specifying the varlist, you must make certain the desired varlist 
exists in all the stored estiamtes. Since not all equations may contain the 
specified varlist, it is usually a poor idea to combine the one column option 
with the varlist.{p_end}


{marker s_4}
{title:Example 4. Shorthand}


{p 4 4 6}{cmd:outreg2} will remeber the last set of options you specified until the end of
the day. The stored command will expire at mid-night to prevent the possible 
loss of finished table by inadvertantly writing over a finished file. The 
following shorthand should be tried separately.{p_end}

{p 4 4 6}{stata outreg2}{p_end}
{p 4 4 6}{stata outreg2, replace}{p_end}
{p 4 4 6}{stata outreg2, seeout}{p_end}

{p 4 4 6}The following two options are excluded from the stored command: 
seeout and replace. These two must be specified each time you invoke {cmd:outreg2}
through the shorthand. To change the stored options, you must invoke the full 
syntax with the specified using file (i.e. outreg2 using myfile, etc). The varlist 
and the stored estimates names are not stored with the command.{p_end}

{p 4 4 6}For someone who is in a hurry, {cmd:outreg2} will take the following syntax, provided 
the desired options have been stored by invoking them in the full syntax. The 
varlist and/or the estlist are still allowed under this syntax. This 
pre-command syntax is made available for the benefit of iterative users.{p_end}

{p 4 4 6}{stata "outreg2 : reg mpg foreign weight headroom"}{p_end}
{p 4 4 6}{stata "outreg2, replace : reg mpg foreign weight headroom"}{p_end}
{p 4 4 6}{stata outreg2}{p_end}
{p 4 4 6}{stata seeout}{p_end}


{marker s_5}
{title:Example 5. Decimal places}


{p 4 4 6}By default the regression coefficients are shown with auto-digits, 
but a user may wish to specify their own number of decimals places. We could use 
the option dec(5) to display 5 decimal places for all statistics or bdec(5) 
for just the coefficient, sdec(5) just for standard error, etc.{p_end}

{p 4 4 6}{stata outreg2 using myfile, replace auto(4)}{p_end}
{p 4 4 6}{stata outreg2 using myfile, dec(5)}{p_end}
{p 4 4 6}{stata outreg2 using myfile, bdec(5) bfmt(f) sdec(7) sfmt(e) see}{p_end}


{marker s_6}
{title:Example 6. Sideway display}

{p 4 4 6}Medical journals often requires the displays to go sideways. Use {opt side:way} to make this 
happen. {opt side:way} is compatible with {opt st:ats( )}.

{p 4 4 6}{stata outreg2 using myfile, sideway stats(coef aster se) noparen bdec(3) replace}{p_end}

{p 4 4 6}Note the above code is equivalent to building the table one column at a time like this:{p_end}

{p 4 4 6}{stata outreg2 using myfile, stats(coef) replace noparen bdec(3)}{p_end}
{p 4 4 6}{stata outreg2 using myfile, stats(aster) noparen bdec(3)}{p_end}
{p 4 4 6}{stata outreg2 using myfile, stats(se) noparen bdec(3)}{p_end}

{p 4 4 6}Some journals often prefer t-statistics to standard errors
and don't use asterisks to denote statistical significance. Some people use brackets. The 
title( ) option requires quotation marks when it contains a comma. Note that {opt bdec} decimal 
option apply to both the coefficients and the standard errors.{p_end}

{p 4 4 6}{stata regress mpg foreign weight}{p_end}
{p 4 4 6}{stata outreg2 using myfile, tstat bracket noaster title("No standard errors!")}{p_end}
{p 4 4 6}{stata seeout}{p_end}


{marker s_7}
{title:Example 7. Summary tables}

{p 4 4 6}Use {opt sum} to place summary statistics into a table. The sample mean and the standard 
deviation for the sample used in the earlier regression will be automatically displayed.

{p 4 4 6}* After estimation{p_end}
{p 4 4 6}{stata sysuse auto, clear}{p_end}
{p 4 4 6}{stata reg mpg price rep weight length}{p_end}
{p 4 4 6}{stata outreg2 using myfile, sum replace}{p_end}
{p 4 4 6}{stata outreg2 using myfile, see}{p_end}

{p 4 4 6}* Regular summary table{p_end}
{p 4 4 6}* note: version 11 and above requires clear* to prevent mismatch between e(b) and e(sample){p_end}
{p 4 4 6}{stata clear*}{p_end}
{p 4 4 6}{stata sysuse auto, clear}{p_end}
{p 4 4 6}{stata outreg2 using myfile, sum(log) replace eqdrop(N mean) see}{p_end}
{p 4 4 6}{stata outreg2 using myfile, sum(detail) replace eqkeep(N max min) see}{p_end}
{p 4 4 6}{stata outreg2 using myfile, sum(detail) replace see}{p_end}


{marker s_8}
{title:Example 8. Drop/keep/order variables}


{p 4 4 6}Specifying a varlist can be convenient to limit the output 
table to only the essential coefficients.  For example, we may want to control for
the influence of dummy variables, but not report their estimated coefficients.{p_end}

{p 4 4 6}{stata sysuse auto, clear}{p_end}
{p 4 4 6}{stata tab rep78, gen(repair)}{p_end}
{p 4 4 6}{stata regress mpg foreign weight repair1-repair4}{p_end}
{p 4 4 6}{stata outreg2 weight foreign using myfile, drop(repair*)}{p_end}

{p 4 4 6}Alternatively, {opt keep( )} and {opt drop( )} can be used to control the displayed 
variables. Use {opt nocons} to drop constants. 

{p 4 4 6}{stata outreg2 using myfile, drop(repair*) replace}{p_end}
{p 4 4 6}{stata outreg2 using myfile, keep(mpg foreign)}{p_end}
{p 4 4 6}{stata outreg2 using myfile, nocons}{p_end}
{p 4 4 6}{stata seeout}{p_end}

{p 4 4 6}There are several ways to order variables in the output. The first is 
to order them when running regression. The second way is to specify varlist 
from within {cmd:outreg2}. Or you might try {opt sortvar( )} or {opt groupvar( )}.{p_end}

{p 4 4 6}* single equation{p_end}
{p 4 4 6}{stata reg mpg rep78 head trunk weight}{p_end}
{p 4 4 6}{stata outreg2 using myfile, replace sortvar(trunk turn)}{p_end}
{p 4 4 6}{stata reg mpg rep78 head weight turn disp gear}{p_end}
{p 4 4 6}{stata outreg2 using myfile, sortvar(trunk turn) see}{p_end}

{p 4 4 6}* multiple equations{p_end}
{p 4 4 6}{stata reg3 (mpg rep78 head trunk weight) (head trunk weight rep78 gear)}{p_end}
{p 4 4 6}{stata outreg2 using myfile, replace long}{p_end}
{p 4 4 6}{stata reg3 (mpg rep78 head weight turn disp ) (mpg rep78 head trunk weight gear)}{p_end}
{p 4 4 6}{stata outreg2 using myfile, sortvar(trunk turn) see long}{p_end}

{p 4 4 6}* groupvar( ) will create super-rows{p_end}
{p 4 4 6}{stata reg mpg rep78 head trunk weight}{p_end}
{p 4 4 6}{stata outreg2 using myfile, replace}{p_end}
{p 4 4 6}{stata reg mpg rep78 head weight turn disp gear}{p_end}
{p 4 4 6}{stata outreg2 using myfile, groupvar(Group1 trunk turn head weight Group2) see}{p_end}


{marker s_9}
{title:Example 9. Adding r( ) e( ) scalars}


{p 4 4 6}Additional statistics may be added with {opt adds:tat( )} or {opt addt:ext( )}. Values stored in 
macros r(), e(), or s() can be included directly. You can see what values are available by typing 
{cmd:ereturn list} or {cmd:return list}.{p_end}

{p 4 4 6}To test the equality of two of the estimated coefficients and report the results in the table, note 
that {cmd:test} will sometimes return chi-squared, then you would instead use {opt addstat(chi-square test, r(chi2))}:
{p_end}

{p 4 4 6}{stata reg mpg foreign weight length}{p_end}
{p 4 4 6}{stata test foreign length}{p_end}
{p 4 4 6}{stata `"outreg2 using myfile, adds("F test: Type=Length=0", r(F), Prob > F, `r(p)') replace"'}{p_end}
{p 4 4 6}{stata seeout} {p_end}

{p 4 4 6}To add results of lincom postestimation command to a table:{p_end}

{p 4 4 6}{stata sysuse auto, clear}{p_end}
{p 4 4 6}{stata reg price mpg rep78 head}{p_end}
{p 4 4 6}{stata lincom mpg + rep}{p_end}
{p 4 4 6}{stata local tstat=r(estimate)/r(se)}{p_end}
{p 4 4 6}{stata local pval = tprob(r(df), abs(`tstat'))}{p_end}
{p 4 4 6}{stata outreg2 using "myfile", adds(joint, r(estimate), t-stat, `tstat', p-val,`pval') replace see}{p_end}

{p 4 4 6}In some cases it is better to save the value of a previously calculated 
statistic in a local macro and then put the macro value into {opt adds:tat( )}. Save the first F 
statistic in a local macro:{p_end}

{p 4 4 6}{stata regress mpg rep78 headroom}{p_end}
{p 4 4 6}{stata test rep78}{p_end}
{p 4 4 6}{stata local F1 = r(F)}{p_end}
{p 4 4 6}{stata test headroom}{p_end}
{p 4 4 6}{stata outreg2 using 2test, addstat(Test1 F, `F1', Test2 F, `r(F)')}{p_end}

{p 4 4 6}It it is missing, {cmd:outreg2} will automatically calculate e(p), which is presumably 
the F-test or chi-square-test of significance of a regression.{p_end}

{p 4 4 6}{stata outreg2 using myfile, addstat(F test, e(p))}{p_end}

{p 4 4 6}Another example would be to report a pseudo R-squared 
after a logit estimation, which {cmd:outreg2} does not otherwise report.{p_end}

{p 4 4 6}{stata logit foreign price trunk weight}{p_end}
{p 4 4 6}{stata outreg2 using myfile, addstat(Pseudo R-squared, `e(r2_p)')}{p_end}


{marker s_10}
{title:Example 10. Odds ratios and exponentials}


{p 4 4 6}Odds ratios are exponential transformations of coefficients. As noted above, 
there is no way of knowing after an estimation command if the 
user chose to report the exponentiated form of coefficients.  The user must 
choose the {opt eform} option in {cmd:outreg2} to get the same form of the coefficients
displayed by the estimation into the {cmd:outreg2} table.{p_end}

{p 4 4 6}For duration models, the exponential form is known as the hazard ratio. For 
other models it is known as odds ratio, relative risk ratio, or incidence rate 
ratio.{p_end}

{p 4 4 6}{stata sysuse auto,clear}{p_end}
{p 4 4 6}{stata logit foreign price mpg rep78, or}{p_end}
{p 4 4 6}{stata outreg2 using eform_example, replace cti(raw)}{p_end}
{p 4 4 6}{stata outreg2 using eform_example, eform cti(odds ratio) see}{p_end}


{marker s_11}
{title:Example 11. Marginal Effects}

{p 4 4 6}{opt mfx} option can be used to report marginal effects after {help mfx} command 
has been applied.{p_end}

{p 4 4 6}{stata sysuse auto, clear}{p_end}
{p 4 4 6}{stata logit foreign mpg rep78 head}{p_end}
{p 4 4 6}{stata mfx compute}{p_end}
{p 4 4 6}{stata outreg2 using myfile, replace}{p_end}
{p 4 4 6}{stata outreg2 using myfile, mfx ctitle(mfx) see}{p_end}

{p 4 4 6}For multiple outcomes, you may want to use {cmd:mfx2} by Ricahrd Williams or 
{search margeff} by Tamas Bartus. They are both available from {help ssc}. {p_end}

{p 4 4 6}{stata sysuse auto, clear}{p_end}
{p 4 4 6}{stata mlogit rep turn mpg price}{p_end}
{p 4 4 6}{stata margeff, at(mean) replace}{p_end}
{p 4 4 6}{stata outreg2 using myfile, cttop(margeff) see replace}{p_end}

{p 4 4 6}{cmd:mfx2} runs a little slower:{p_end}
{p 4 4 6}{stata mlogit rep turn mpg price}{p_end}
{p 4 4 6}{stata mfx2, replace}{p_end}
{p 4 4 6}{stata outreg2 using myfile, long cttop(mfx2) see replace}{p_end}

{p 4 4 6}The marginal effects reported by {search dprobit}, {net_d:dlogit2}, {net_d:dprobit2}, 
and {search dmlogit2} are automatically reported by {cmd:outreg2}.{p_end}

{p 4 4 6}Because {net_d:truncreg}, {net_d:marginal}, and {net_d:dtobit} report 
both regression coefficients and marginal effects, the user must specify the 
{opt margin} option for {cmd:outreg2} report the marginal effects.{p_end}

{p 4 4 6}{search dtobit}, on the other hand, calculates three different marginal effects. 
The user must specify which marginal effect, the unconditional, conditional, 
or the probability uncensored, to be reported. Note that "version 6" must be set for 
{cmd:dtobit} to work.{p_end}

{p 4 4 6}{stata tobit mpg trunk weight, ll(17)}{p_end}
{p 4 4 6}{stata `"version 6: dtobit"'}{p_end}
{p 4 4 6}{stata outreg2 using myfile, margin(u) ctitle(Unconditional) nor2 replace}{p_end}
{p 4 4 6}{stata outreg2 using myfile, margin(c) ctitle(Conditional) nor2}{p_end}
{p 4 4 6}{stata outreg2 using myfile, margin(p) ctitle(Probability) nor2 see}{p_end}


{marker s_12}
{title:Example 12. Word or Excel files}

{p 4 4 6}
Use {opt word} or {opt excel} for automatic generation of Word/Excel files:

{p 4 4 6}{stata reg price mpg rep78 headroom trunk weight}{p_end}
{p 4 4 6}{stata outreg2 using myfile, word excel replace}{p_end}

{p 4 4 6}
Follow these directions for manual conversions from .txt files:

{p 4 4 6}
In {cmd:MS Word}, open or insert the file created by {cmd:outreg2}. Select the estimation text that 
is in columns (not the notes at the bottom of the table or the title at the top, if any), and choose 
Table, Convert Text to Table.

{p 4 4 6}To shift the table within {cmd:MS Word}, highlight the entire table, choose Table 
Properties (go the top menu, drag down on the Table option), and then click the alignment as 
Left instead of Center. 

{p 4 4 6}
In {cmd:Excel}, open the file created by {cmd:outreg2} and follow the default choices 
in the Text Import Wizard (if you do not see the file, choose All Files as the File Type). 
Prevent the conversion of the parenthesis into a negative number (an accounting convention) 
by doing the following: 1. import it as "Delimited", 2. choose Tab as the Delimiters, and 
3. Choose "Text" as Column data format after Highlighting all the columns by shift-down, right-clicking.

{p 4 4 6}If you wish to export the 
.xml table to a word processor, you should separately copy the table and the notes 
at the bottom of the table (prevents the notes from taking up too much space). You 
can avoid this problem by opening the .txt file manually from inside {cmd:MS Excel}, 
as detailed earlier, or copy and paste the notes into another cells in 
{cmd:MS Excel}, which will cause them to be displayed properly. 

{p 4 4 6}To get rid of "green tabs" in Excel: From inisde Excel, Tools > Options > Error Checking. 
When you get there, uncheck "Number stored as text". No more green triangles.

{p 4 4 6}
You can also use {cmd:{browse "http://www.stata.com/support/faqs/data/convert2.html":Stat/Transfer}} 
if you have one. Choose ASCII-Delimited as the input file and choose {cmd:Excel} 
as the output file. You will need to adjust the column widths from inside 
{cmd:Excel}.


{marker s_13}
{title:Example 13. TeX files}


{p 4 4 6}
{cmd:LaTeX} compatible table can be created with {opt tex} option. With the use 
of free conversion software, such as MiKTeX, you can create Adobe PDF files of 
the finished tables directly within Stata by invoking a shell command.

{p 4 4 6}{stata regress mpg foreign weight}{p_end}
{p 4 4 6}{stata outreg2 using myfile, tex replace}{p_end}

{p 4 4 6}{cmd:outreg2's} TeX tables are fully formatted, unlike the ASCII tables.  This 
requires free TeX to Adobe PDF conversion software, such as the MiKTeX 
(www.miktek.org) for Windows or teTeX (www.tug.org/teTeX/) for Unix/Linux.  The 
whole process is automated in Stata with a shell command:{p_end}

{p 4 4 6}{stata !texify -p -c -b --run-viewer myfile.tex}  {using MiKTeX on Windows){p_end}
{p 4 4 6}{stata !pdflatex myfile}                          (using teTeX on Linux){p_end}

{p 4 4 6}{cmd:outreg2} cannot append TeX format tables to one another, so regressions must be 
appended in ASCII form until the last regression, which is appended with the 
{opt tex} option.{_end}

{p 4 4 6}The base font point size of tex in a TeX table can be specified with the {opt tex()} 
parameter. TeX only allows font sizes of 10 and 11 points besides the default
of 12 point. The {opt texfrag} option creates a TeX fragment for inclusion in a larger 
TeX document. For example, a TeX fragment table from the first regression above could be created with 

{p 4 4 6}{stata outreg2 using myfile, tex(frag)}{p_end}

{p 4 4 6}and then be included in the following TeX document with the \input{myfile} 
command:{p_end}

        \documentclass[10pt]{article}
        \begin{document}
        ... text before inclusion of table myfile.tex ...
        \input{myfile}
        ... text after inclusion of table myfile.tex ...
        \end{document}


{p 4 4 6}Technical Note: Many of the non-alphanumeric characters have special meaning 
in TeX, namely _, %, #, $, &, ~, ^^, \, {, }.  If you want these characters to 
be printed in TeX like any other character, include a \ in front of the 
character.  {cmd:outreg2} automatically does this for the first two, _ and %, 
because _ often turns up in Stata variable names and % is common in variable
labels and explanatory notes.  You can include the other characters in titles,
variable labels, or notes if you preceed them with with a \ in the Stata text.
The exception is \ itself; \ must be replaced with $\backslash$ to render
properly in TeX.{p_end}

{p 4 4 6}In addition, in TeX the characters <, >, and | will only appear as themselves 
in math mode, so they must be written as $<$, $>$, and $|$.{p_end}

{p 4 4 6}TeX codes can be inserted into {cmd:outeg2} titles, variable labels, and added 
notes. This requires understanding TeX formatting codes. The example below 
creates a Greek letter chi with a squared exponent for a chi-squared test 
statistic.{p_end}

{phang2}{stata outreg2 using myfile0, addstat($\chi^2$, 22.1) tex}{p_end}

{p 4 4 6}I said above that {cmd:outreg2} automatically converted _ to \_.  An exception is 
when it finds two $'s in the text, in which case it assumes the _ is a 
subscript designator in a TeX inline equation. That means that if you want to 
add text that includes an inline equation, but you really want the _ to appear 
as such in the TeX table, you must replace it with a \_.{p_end}

{p 4 4 6}Be careful when using $.  When $ is immediately followed by a letter, Stata 
will interpret this as a global macro.  To get Stata to output a literal $, 
precede it with "\": \$.  If you want, for example, a properly TeX typeset 
R-squared to survive in {cmd:outreg2}, rather than "$R^2$" you must use "\$R^2$".
$R would be evaluated by {cmd:outreg2} as the value of global macro R, which is 
probably empty.{p_end}

{p 4 4 6}Putting a literal "$" in TeX output can be confusing: to get "$US" in the TeX 
output, for example, one needs "\$US" in the TeX input file, which requires  
"\\\$US" in Stata text, because Stata resolves "\\" into "\" and "\$" into "$".{p_end}

{p 4 4 6}A final quirk: you cannot use the results of the Stata macro $S_FN in {cmd:outreg2}
text for a TeX table if you use Microsoft Windows. $S_FN returns the path name 
for the current data file which in Windows includes \ characters which will 
prevent the TeX table from rendering properly.{p_end}


{marker s_14}
{title:Example 14. Adding column titles or notes}


{p 4 4 6}You can add a column title "Base case (mpg)" to distinguish this regression from a 
second regression. No quotation marks are required around the column title because 
it does not contain commas. Use {opt cttop( )} to add additional column title to the default column titles.{p_end}

{p 4 4 6}{stata outreg2 using myfile, replace ctitle(Base case (mpg))}{p_end}
{p 4 4 6}{stata outreg2 using myfile, cttop(On top)}{p_end}

{p 4 4 6}You can add explanatory note at the bottom of a column using the {opt addn:ote} option.
Note that since the text in {opt addn:ote} does not contain parentheses or commas
it does not need quotation marks.{p_end}

{p 4 4 6}{stata outreg2 using myfile, addnote(Dummy variables not shown)} {p_end}

{p 4 4 6}{opt addnote} for inserting a blank line, followed by the time the program was run (from the 
built-in Stata functions $S_TIME and $S_DATE), and the dataset used by the 
estimation (from the Stata function $S_FN).{p_end}

{p 4 4 6}{stata regress mpg foreign weight length}{p_end}
{p 4 4 6}{stata `"outreg2 using myfile, addn("", "Time $S_TIME, $S_DATE", Data from $S_FN) replace"'} {p_end}


{marker s_15}
{title:Example 15. n-way cross-tabulation}

{p 4 4 6}n-way tabulation likes of which are also produced by tab3way or table. It will take about a minute to run.{p_end}

{p 4 4 6}* Prepare data{p_end}
{p 4 4 6}{stata sysuse auto, clear}{p_end}
{p 4 4 6}{stata egen mileage=cut(mpg), group(10)}{p_end}
{p 4 4 6}{stata egen paid=cut(price), group(3)}{p_end}
{p 4 4 6}{stata egen heavy=cut(weight), group(3)}{p_end}

{p 4 4 6}* 3-way cross-tabulation{p_end}
{p 4 4 6}{stata outreg2 mileage paid heavy using myfile, see replace cross}{p_end}

{p 4 4 6}* 3-way cross-tabulation sideway{p_end}
{p 4 4 6}{stata outreg2 mileage paid heavy using myfile, see replace cross side}{p_end}

{p 4 4 6}* 5-way cross-tabulation without percentage{p_end}
{p 4 4 6}{stata outreg2 mileage paid foreign rep78 heavy using myfile, see replace cross stats(coef)}{p_end}


{marker s_16}
{title:Example 16. Group summary table}

{p 4 8 8}{stata sysuse auto, clear}{p_end}
{p 4 8 8}{stata gen white=cond(uniform()>.5,1,0)}{p_end}
{p 4 8 8}{stata gen black=cond(white==1,0,1)}{p_end}
{p 4 8 8}{stata gen male=cond(uniform()>.5,1,0)}{p_end}
{p 4 8 8}{stata gen female=cond(male==1,0,1)}{p_end}

{p 4 8 8}{stata outreg2 using myfile if white==1 & male==1, sum(log) eqkeep(mean N) cttop(white, male) drop(white male female) excel replace}{p_end}
{p 4 8 8}{stata outreg2 using myfile if white==1 & female==1, sum(log) eqkeep(mean N) cttop( , female) drop(white male female) excel}{p_end}
{p 4 8 8}{stata outreg2 using myfile if white==1, sum(log) eqkeep(mean N) cttop( , total) drop(white male female) excel}{p_end}
{p 4 8 8}{stata outreg2 using myfile if black==1 & male==1, sum(log) eqkeep(mean N) cttop(black, male) drop(white male female) excel}{p_end}
{p 4 8 8}{stata outreg2 using myfile if black==1 & female==1, sum(log) eqkeep(mean N) cttop( , female) drop(white male female) excel}{p_end}
{p 4 8 8}{stata outreg2 using myfile if black==1, sum(log) eqkeep(mean N) cttop( , total) drop(white male female) excel}{p_end}


{p 4 8 8}* or just do it as a -by:- command{p_end}
{p 4 8 8}{stata bys male black: outreg2 using myfile, sum(log) eqkeep(mean N) drop(white female male black) excel replace}{p_end}


{marker s_17}
{title:Example 17. Fixed effects or legends}

{p 4 4 6}Two-way fixed-effects estimation with dummy indicators:{p_end}

{p 4 4 6}* set up data{p_end}
{p 4 4 6}{stata sysuse auto, clear}{p_end}
{p 4 4 6}{stata ren rep78 state}{p_end}
{p 4 4 6}{stata ren turn id}{p_end}
{p 4 4 6}{stata keep id price mpg weight state}{p_end}
{p 4 4 6}{stata tab state, gen(ST)}{p_end}

{p 4 4 6}* regress and report{p_end}
{p 4 4 6}{stata xtreg price mpg weight ST*, fe i(id)}{p_end}
{p 4 4 6}{stata outreg2 using myfile, replace drop(ST*) addtext(State FE, YES, Year FE, YES)}{p_end}
{p 4 4 6}{stata xtreg price mpg weight ST*, fe i(id)}{p_end}
{p 4 4 6}{stata outreg2 using myfile, drop(ST*) addtext(State FE, NO, Year FE, YES)}{p_end}
{p 4 4 6}{stata reg price mpg weight ST*}{p_end}
{p 4 4 6}{stata outreg2 using myfile, drop(ST*) addtext(State FE, NO, Year FE, NO)}{p_end}

{p 4 4 6}* legend{p_end}
{p 4 4 6}{stata outreg2 using myfile,  st(str(Coef) str(Stn Err) str(Spearman)) noparen ct(Legend) replace}{p_end}
{p 4 4 6}{stata outreg2 using myfile,  st(coef se spearman blank)}{p_end}


{marker s_18}
{title:Example 18. Insert r-class cmd( ) outputs}

{p 4 4 6}You can insert output from r-class command in the table body through cmd( : ) sub-option. Indep and dependent 
variables will be fed to them.{p_end}

{p 4 4 6}* outputs Kendall's tau-a and tau-b{p_end}
{p 4 4 6}sysuse auto, clear{p_end}
{p 4 4 6}reg rep78 headroom length turn gear_ratio{p_end}
{p 4 12 8}outreg2 using myfile, replace stats(corr, spearman, cmd(r(tau_a): ktau), /*{p_end}
{p 12 12 8}*/cmd(r(tau_b): ktau)){p_end}

{p 4 4 6}* double-check{p_end}
{p 4 4 6}ktau rep78 headroom{p_end}
{p 4 4 6}ret list{p_end}


{p 4 4 6}{ul:Write and insert your own r-class output}

{p 4 4 6}You can write your own r-class program and insert their outputs. A scalar should be returned 
on two inputs: independent variable and dependent variable. It needs to accept [if] syntax. 
c_local programs will work, too, but there might be a conflict.{p_end}

{p 4 4 6}* r-class program that calculates coefficient of variation{p_end}
{p 4 4 6}cap prog drop coefvar{p_end}
{p 4 4 6}prog define coefvar, rclass{p_end}
{p 8 8 8}syntax varlist(max=2) [if]{p_end}
{p 8 8 8}gettoken dep indep : varlist{p_end}
{p 8 8 8}qui sum `indep' `if'{p_end}
{p 8 8 8}local variation=`r(sd)'/`r(mean)'*100{p_end}
{p 8 8 8}ret scalar variation=`variation'{p_end}
{p 4 4 6}end{p_end}

{p 4 4 6}* test your r-class program{p_end}
{p 4 4 6}sysuse auto, clear{p_end}
{p 4 4 6}reg rep78 headroom length turn gear_ratio{p_end}
{p 4 4 6}coefvar rep78 headroom if e(sample){p_end}
{p 4 4 6}ret list{p_end}

{p 4 4 6}* run them{p_end}
{p 4 4 6}sysuse auto, clear{p_end}
{p 4 4 6}reg rep78 headroom length turn gear_ratio{p_end}
{p 4 4 6}outreg2 using myfile, replace stats(coef, se, sd, cmd(r(variation): coefvar)){p_end}


{p 4 4 6}{ul:A c_local program with its own option}{p_end}

{p 4 4 6}* calculates coefficient of variation{p_end}
{p 4 4 6}cap prog drop coefvar2{p_end}
{p 4 4 6}prog define coefvar2{p_end}
{p 8 8 8}syntax varlist(max=2) [if], [proportion]{p_end}
{p 8 8 8}gettoken dep indep : varlist{p_end}
{p 8 8 8}qui sum `indep' `if'{p_end}
{p 8 8 8}local hundred 100{p_end}
{p 8 8 8}if "`proportion'"=="proportion" {{p_end}
{p 12 12 8}local hundred 1{p_end}
{p 8 8 8}}{p_end}
{p 8 8 8}local variation=`r(sd)'/`r(mean)'*`hundred'{p_end}
{p 8 8 8} c_local variation=`variation'{p_end}
{p 4 4 6}end{p_end}

{p 4 4 6}* run them{p_end}
{p 4 4 6}sysuse auto, clear{p_end}
{p 4 4 6}reg rep78 headroom length turn gear_ratio{p_end}
{p 4 4 6}outreg2 using myfile, stats(coef, se, sd, cmd(variation: coefvar2, proportion)){p_end}


{p 4 4 6}{ul:Send one to the e-mail address below}

{p 4 4 6}If you can send me a program like these, and I agree it is useful, then it can made into 
a sub-option out of it for inclusion the future versions of -outreg2-. Please note that it should be 
something of interest to other people.{p_end}


{hline}

{marker s_Differences}
{title:Different versions of {cmdab:outreg} and {cmdab:outreg2}}

{p 4 4 6}{cmd:outreg2} will work under different versions of Stata:{p_end}

{p 4 4 6}Stata 11.0: {cmd:seeout} will require an additional keyboard hit before moving on{p_end}
{p 4 4 6}Stata 8.2: full functionality{p_end}
{p 4 4 6}Stata 8.0: reported stored estimates will be left behind when they are specified{p_end}
{p 4 4 6}Stata 7.0: no stored estimated{p_end}
{p 15 15 15}no colon character ":" in your file path; use -cd- instead{p_end}
{p 15 15 15}Shorthand syntax for outreg2 or seeout will not work in versions earlier than 8.0.{p_end}
{p 15 15 15}tfmt(.), rfmt(.), pft(.), afmt(.) do not work{p_end}
{p 15 15 15}cmd( ) and str( ) do not work.{p_end}
{p 15 15 15}Other limitations may exit exist; best not to try anything complicated{p_end}

{p 4 4 6}
Compared to the original {cmd:outreg}, {cmd:outreg2} implements the following as 
the default: {opt append}, {opt 3aster}, {opt coefastr}, {opt se}, and {opt nolabel}. 
{opt 2aster} and {opt tstat} provide the access to the old default options. {opt si:gsymb} 
is replaced with {opt sym:bol}. {opt x:stats} is not supported.{p_end}

{p 4 4 6}
The auxiliary statistics (standard error, etc) are no longer reported in 
absolute values. The levels of significance are strictly less than the values 
(used to be less than or equal to). bdec and bfmt no longer take multiple inputs.

{p 4 4 6}
The embedded spaces in the folder names are now accepted. {opt ti:tle(list)} can be added anytime. 
The .out extension is phased out in favor of .txt extension. A new file will be created if it did not exist. 
The past restrictions on the number and the size of variable names have been 
generally expanded to the system limit.{p_end}

{p 4 4 6}
The newly available features are the access to {opt label}, 
{help ereturn:{opt e(ereturn scalars)}}, automatically formatted digits
by {opt auto(integer)} and {opt less(integer)}, {opt alpha(numlist)} provides 
user-defined test of hypothesis, {opt seeo:ut} calls up the pop up table in 
the data browser view, the choice of equation names as wide or {opt long}, 
the converted tables in {opt word}, {opt excel}, and {opt tex} with the 
{cmd:shellout} commands for them placed on the screen.{p_end}

{p 4 4 6}
The {cmd:[}{help estimates:{it:estlist}}{cmd:]}, which is a 
list of stored estimates, is accepted with or without wildcard abbreviations. 
The shorthand syntax with a limited option can now be implemented 
as an independent command following a regression command, or as a pre-command 
preceeding it.{p_end}

{p 4 4 6}
The {cmd:seeout} shell is also placed on the screen. The 
{cmd:seeout} command will work only after {cmd:outreg2}. A majority of options 
should work with 8.2. The shell commands were designed with a Windows XP/NT. 
They will not work on non-Windows platforms.{p_end}


{title:Author}

{p 4 4 6}Roy Wada{p_end}
{p 4 4 6}roywada@hotmail.com{p_end}

{p 4 4 6}based on the earlier works by{p_end}
{p 4 4 6}John Luke Gallup{p_end}
{p 4 4 6}john_gallup@alum.swarthmore.edu{p_end}

{p 4 4 6}Thanks to Kit Baum for advice and providing access to John's later works. 
I also thank those who have reported errors, making it possible to fix them in timely 
fashion.{p_end}


{title:Also see}

{p 3}STB:   sg97 (STB-46, STB-49, STB-58){p_end}
{p}Manual:  {bf:[U] Estimation and post-estimation commands}{p_end}
{p 9}{bf:[U] Overview of model estimation}{p_end}
{p 9}{bf:[R] Estimation commands}{p_end}

{p }Online:  {help est}, {help postfile}, {help outfile}, {help outsheet}, {help save}, 
{search modltbl}, {search desrep} {p_end}

{s6hlp}
{smcl}