Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

From |
Steve Samuels <sjsamuels@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: questions about using survey commands in Stata 8 |

Date |
Thu, 3 May 2012 23:11:57 -0400 |

Have you searched the -help- for Stata 8's survey commands or read the Survey Manual? I don't have the manual any more, but I recall that the survey commands did have a subpop() option, for example: **************************** svymean myvar, subpop(mypop) **************************** Steve sjsamuels@gmail.com On May 3, 2012, at 3:46 PM, Karen Rappaport wrote: I am using Stata 8.2 to analyze a large public data base created from a survey. I would like to limit my analyses to subjects between the ages of 20 and 65. However, as I found on a website (http://www.ats.ucla.edu/stat/stata/faq/svy_stata_subpop.htm), I cannot simply delete all observations of subjects under 20 years of age and over 65 years of age. ("If the data set is subset, meaning that observations not to be included in the subpopulation are deleted from the data set, the standard errors of the estimates cannot be calculated correctly.") The information I can find indicates that I need to use Stata's subpopulation option(s). However, the subpopulation options that are suggested in the link above can only be used in Stata 9 and 10. I do not know whether another subpopulation option exists for Stata 8 that I have not been able to find or if it simply does not exist. Do I have no choice but to include all age groups in my analyses? How did researchers using Stata limit their analyses to subpopulations before Stata 9 was available? I considered the possibility of creating dichotomous variables to separate the age groups I want to analyze from those I do not. However the "by" command does not work with survey data. (I want to analyze the subpopulation of people between the ages of 20 and 65 using other dichotomous variables, too.) Please advise! Thank you. Karen * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: questions about using survey commands in Stata 8***From:*Karen Rappaport <karenrappaport@yahoo.com>

- Prev by Date:
**st: Re: Report number of groups for first-difference regression** - Next by Date:
**Re: st: questions about using survey commands in Stata 8** - Previous by thread:
**st: questions about using survey commands in Stata 8** - Next by thread:
**Re: st: questions about using survey commands in Stata 8** - Index(es):