ratio.hlp

是一个经济学管理应用软件 很难找的 但是经济学学生又必须用到

{smcl}
{* 18mar2005}{...}
{cmd:help ratio} {right:dialog:  {bf:{dialog ratio}}{space 15}}
{right:also see:  {help ratio postestimation}}
{hline}

{title:Title}

{p2colset 5 18 20 2}{...}
{p2col :{hi:[R] ratio} {hline 2}}Estimate ratios{p_end}
{p2colreset}{...}


{title:Syntax}

{phang}
Basic syntax

{p 8 17 2}
{cmd:ratio} [{it:name}{cmd::}] {it:varname} [{cmd:/}] {it:varname}

{phang}
Full syntax

{p 8 13 2}
{cmd:ratio} {cmd:(}[{it:name}{cmd::}] {it:varname} [{cmd:/}] 
   {it:varname}{cmd:)}{break}
      [{cmd:(}[{it:name}{cmd::}] {it:varname} [{cmd:/}] {it:varname}{cmd:)} ...]
 	{ifin} [{cmd:,} {it:options}]

{synoptset 26 tabbed}{...}
{synopthdr}
{synoptline}
{syntab:Model}
{synopt :{opth std:ize(varname)}}variable identifying strata for standarization{p_end}
{synopt :{opth stdw:eight(varname)}}weight variable for standarization{p_end}
{synopt :{opt nostdr:escale}}do not rescale the standard weight variable{p_end}

{syntab:if/in/over}
{synopt :{cmd:over(}{it:{help varlist}}[{cmd:,} {opt nolab:el}]{cmd:)}}group over
subpopulations defined by {it:varlist}, optionally, suppress group labels{p_end}

{syntab:SE/Cluster}
{synopt :{opth vce(vcetype)}}{it:vcetype} may be {opt boot:strap} or {opt jack:knife}{p_end}
{synopt :{opth cl:uster(varname)}}adjust standard errors for intragroup 
correlation{p_end}

{syntab:Reporting}
{synopt :{opt l:evel(#)}}set confidence level; default is {cmd:level(95)}{p_end}
{synopt :{opt noh:eader}}suppress the table header{p_end}
{synopt :{opt nol:egend}}suppress the table legend{p_end}
{synoptline}
{p2colreset}{...}
{p 4 6 2}{cmd:svy} may be used with {cmd:ratio}; see {helpb "svy: ratio"}.{p_end}
{p 4 6 2}{cmd:fweight}s, {cmd:pweight}s, and {cmd:iweight}s are
allowed; see {help weight}.{p_end}
{p 4 6 2}See {help ratio postestimation} for additional capabilities of 
estimation commands.{p_end}


{title:Description}

{pstd}
{cmd:ratio} produces estimates of ratios, along with standard errors.


{title:Options}

{dlgtab:Model}

{phang}
{opth stdize(varname)} specifies that the point estimates be adjusted by
direct standardization across the strata identified by {it:varname}.  This
option requires the {opt stdweight()} option.

{phang}
{opth stdweight(varname)} specifies the weight variable associated with the
strata identified in the {opt stdize()} option.  The standardization weights
must be constant within the strata identified in the {opt stdize()} option.

{phang}
{opt nostdrescale} prevents the standardization weights from being rescaled
within the {opt over()} groups.  This option requires {opt stdize()} but is
ignored if the {opt over()} option is specified.

INCLUDE help srs_sum_opdesc


{title:Example}

{psee}{cmd:. ratio mpg1/mpg2}{p_end}


{title:Also see}

{psee}Manual:  {hi:[R] ratio}{p_end}

{psee}Online:  {help ratio postestimation};{break} 
{helpb mean}, {helpb proportion}, {helpb "svy: ratio"}, {helpb total}{p_end}