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

				{* 16mar2005}{...}
				{* NOTE: this files shares common option descriptions with the following:}{...}
				{*       svy_opdesc.ihlp}{...}
				{*       svy_opdesc_irr.ihlp}{...}
				{*       svy_opdesc_or.ihlp}{...}
				{*       svy_opdesc_rrr.ihlp}{...}
				{*       svy_sum_opdesc.ihlp}{...}
				{dlgtab:if/in/over}
				
				{phang}
				{opt over}{cmd:(}{varlist} [{cmd:,} {opt nolab:el}]{cmd:)}
				specifies that estimates be computed for multiple subpopulations,
				which are identified by the different values of the variables in 
				{it:varlist}.
				
				{pmore}
				When this option is supplied with a single variable name, such as
				{opth over(varname)}, the value labels of {it:varname} are used to identify
				the subpopulations.  If {it:varname} does not have labeled values (or there
				are unlabeled values), the values themselves are used, provided that they are
				non-negative integers.  Noninteger values, negative values, and labels that
				are not valid Stata names are substituted with a default identifier.
				
				{pmore}
				When {cmd:over()} is supplied with multiple variable names, each subpopulation
				is assigned a unique default identifier.
				
				{phang2}
				{opt nolabel} specifies that value labels attached to the variables
				identifying the subpopulations be ignored.
				
				{dlgtab:SE/Cluster}
				
				{phang}
				{opt vce(vcetype)}; see {it:{help vce_option}}.
				
				{phang}
				{opth cluster(varname)}; see
				      {help estimation options##cluster():estimation options}.
				
				{dlgtab:Reporting}
				
				{phang}
				{opt level(#)}; see {help estimation options##level():estimation options}.
				
				{phang}
				{opt noheader} prevents the table header from being displayed. This option
				implies {opt nolegend}.
				
				{phang}
				{opt nolegend} prevents the table legend identifying the subpopulations from
				being displayed.
				{p_end}