Stata 15 help for estimates table

[R] estimates table -- Compare estimation results


estimates table [namelist] [, options]

namelist is the name given to previously stored estimation results, a list of names, _all, or *. A name may be ., meaning the current (active) estimates. _all and * mean the same thing.

options Description ------------------------------------------------------------------------- Main stats(scalarlist) report scalarlist in table star[(#1 #2 #3)] use stars to denote significance

Options keep(coeflist) report coefficients in order specified drop(coeflist) omit specified coefficients from table equations(matchlist) match equations of models as specified

Numerical formats b[(%fmt)] how to format coefficients, which are always reported se[(%fmt)] report standard errors and use optional format t[(%fmt)] report t or z and use optional format p[(%fmt)] report p-values and use optional format stfmt(%fmt) how to format scalar statistics

General format varwidth(#) use # characters to display variable names and statistics modelwidth(#) use # characters to display model names

eform display coefficients in exponentiated form varlabel display variable labels rather than variable names newpanel display statistics in separate table from coefficients

style(oneline) put vertical line after variable names; the default style(columns) put vertical line separating every column style(noline) suppress all vertical lines

coded display compact table

Reporting display_options control row spacing, line width, and display of omitted variables and base and empty cells

title(string) title for table ------------------------------------------------------------------------- title() does not appear in the dialog box.


Statistics > Postestimation


estimates table organizes estimation results from one or more models in a single formatted table.


+------+ ----+ Main +-------------------------------------------------------------

stats(scalarlist) specifies a list of any of or all the names of scalars stored in e() to be displayed in the table. scalarlist may also contain the following:

aic Akaike's information criterion bic Schwarz's Bayesian information criterion rank rank of e(V) (# of free parameters in model)

The specified statistics do not have to be available for all estimation results being displayed.

For example, stats(N ll chi2 aic) specifies that e(N), e(ll), e(chi2), and AIC be included. In Stata, e(N) records the number of observations; e(ll), the log likelihood; and e(chi2), the chi-squared test that all coefficients in the first equation of the model are equal to zero.

star and star(#1 #2 #3) specify that stars (asterisks) are to be used to mark significance. The second syntax specifies the significance for one, two, and three stars. If you specify simply star, that is equivalent to specifying star(.05 .01 .001), which means one star (*) if p < 0.05, two stars (**) if p < 0.01, and three stars (***) if p < 0.001.

The star and star() options may not be combined with the se, t, or p option.

+---------+ ----+ Options +----------------------------------------------------------

keep(coeflist) and drop(coeflist) are alternatives; they specify coefficients to be included or omitted from the table. The default is to display all coefficients.

If keep() is specified, it specifies not only the coefficients to be included but also the order in which they appear.

A coeflist is a list of coefficient names, each name of which may be simple (for example, price), an equation name followed by a colon (for example, mean:), or a full name (for example, mean:price). Names are separated from each other by blanks.

When full names are not specified, all coefficients that match the partial specification are included. For instance, drop(_cons) would omit _cons for all equations.

equations(matchlist) specifies how the equations of the models in namelist are to be matched. The default is to match equations by name. Matching by name usually works well when all results were fit by the same estimation command. When you are comparing results from different estimation commands, however, specifying equations() may be necessary.

The most common usage is equations(1), which indicates that all first equations are to be matched into one equation named #1.

matchlist has the syntax

term [, term ... ]

term is

[eqname =] #:#...:# (syntax 1)

[eqname =] # (syntax 2)

In syntax 1, each # is a number or a period (.). If a number, it specifies the position of the equation in the corresponding model; 1:3:1 would indicate that equation 1 in the first model matches equation 3 in the second, which matches equation 1 in the third. A period indicates that there is no corresponding equation in the model; 1:.:1 indicates that equation 1 in the first matches equation 1 in the third.

In syntax 2, you specify just one number, say, 1 or 2, and that is shorthand for 1:1...:1 or 2:2...:2, meaning that equation 1 matches across all models specified or that equation 2 matches across all models specified.

Now that you can specify a term, you can put that together into a matchlist by separating one term from the other by commas. In what follows, we will assume that three names were specified,

. estimates table alpha beta gamma, ... equations(1) is equivalent to equations(1:1:1); we would be saying that the first equations match across the board.

equations(1:.:1) would specify that equation 1 matches in models alpha and gamma but that there is nothing corresponding in model beta.

equations(1,2) is equivalent to equations(1:1:1, 2:2:2). We would be saying that the first equations match across the board and so do the second equations.

equations(1, 2:.:2) would specify that the first equations match across the board, that the second equations match for models alpha and gamma, and that there is nothing equivalent to equation 2 in model beta.

If equations() is specified, equations not matched by position are matched by name.

+-------------------+ ----+ Numerical formats +------------------------------------------------

b(%fmt) specifies how the coefficients are to be displayed. You might specify b(%9.2f) to make decimal points line up. There is also a b option, which specifies that coefficients are to be displayed, but that is just included for consistency with the se, t, and p options. Coefficients are always displayed.

se, t, and p specify that standard errors, t or z statistics, and p-values are to be displayed. The default is not to display them. se(%fmt), t(%fmt), and p(%fmt) specify that each is to be displayed and specifies the display format to be used to format them.

stfmt(%fmt) specifies the format for displaying the scalar statistics included by the stats() options.

+----------------+ ----+ General format +---------------------------------------------------

varwidth(#) specifies the number of character positions used to display the names of the variables and statistics. The default is 12.

modelwidth(#) specifies the number of character positions used to display the names of the models. The default is 12.

eform displays coefficients in exponentiated form. For each coefficient, exp(b) rather than b is displayed, and standard errors are transformed appropriately. Display of the intercept, if any, is suppressed.

varlabel specifies that variable labels be displayed instead of variable names.

newpanel specifies that the statistics be displayed in a table separated by a blank line from the table with coefficients rather than in the style of another equation in the table of coefficients.

style(stylespec) specifies the style of the coefficient table.

style(oneline) specifies that a vertical line be displayed after the variables but not between the models. This is the default.

style(columns) specifies that vertical lines be displayed after each column.

style(noline) specifies that no vertical lines be displayed.

coded specifies that a compact table be displayed. This format is especially useful for comparing variables that are included in a large collection of models.

+-----------+ ----+ Reporting +--------------------------------------------------------

display_options: noomitted, vsquish, noemptycells, baselevels, allbaselevels, nofvlabel, fvwrap(#), and fvwrapon(style); see [R] estimation options.

The following option is available with estimates table but is not shown in the dialog box:

title(string) specifies the title to appear above the table.


Setup . sysuse auto . regress mpg gear turn . estimates store small . regress mpg gear turn length . estimates store large

Display a table of coefficients for both small and large estimation results . estimates table small large

Same as above, but also display standard errors . estimates table small large, se

Same as above, but display coefficients and standard errors to 4 decimal places . estimates table small large, b(%7.4f) se(%7.4f)

Same as above, but also display sample size and adjusted R-squared . estimates table small large, b(%7.4f) se(%7.4f) stats(N r2_a)

Stored results

estimates table stores the following in r():

Macros r(names) names of results used

Matrices r(coef) matrix M: n x 2*m M[i, 2j-1] = ith parameter estimate for model j; M[i, 2j ] = variance of M[i, 2j-1]; i = 1, ..., n; j = 1, ..., m

r(stats) matrix S: k x m (if option stats() specified) S[i, j] = ith statistic for model j; i = 1, ..., k; j = 1, ..., m

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