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From |
Drew Lover <graupel75@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Cluster Survey DHS Parameterization |

Date |
Fri, 22 Oct 2010 10:06:05 +0800 |

Hi Steve, thanks for all the great info. The weights are consistent throughout the survey, so no changes there. I have actually merged some of the HH and individual level data into a new dta, but re-checked the original files to make sure. WIll see if the PSU values from the tables reproduce; will report back. cheers! On Fri, Oct 22, 2010 at 12:49 AM, Steve Samuels <sjsamuels@gmail.com> wrote: > -- > > Correction: there are seven strata in the table;one cell is empty. > > "It looks to me like you should define eight strata, as shown in Table A1 p. 42" > > Steve > sjsamuels@gmail.com > > > On Thu, Oct 21, 2010 at 9:50 AM, Steve Samuels <sjsamuels@gmail.com> wrote: >> Andew Lover: >> >> It really helps if you give all references. I assume that the list >> discussion you referred to is the thread at >> http://www.stata.com/statalist/archive/2009-07/msg00906.html. I've >> little experience with DHS, so take my comments below with that in >> mind. >> >> It looks to me like you should define eight strata, as shown in Table >> A1 p. 42 of the report you reference. These are presumably formed from >> (v023 or v024 -I don't know which ) and v025. Compare these to the >> v022 stratum variable. >> >> To check: Make sure that the frequency counts of PSUs match the totals >> in that table. You should also be able to reproduce the means and >> proportions in Table B2, page 49 (they are all ratio estimates) Your >> standard errors by Taylor Series linearization should be the same if >> you use the first-stage fpcs. >> >> Your statement that ORs vary with the cluster specification puzzles >> me. This shouldn't happen. If it does, then something is very wrong. >> >> Also, you seem to be working with the HH file, since you refer to HVxx >> variables. ORs would usually be computed on individual data. It's >> possible that individual weights differ from HH weights if there was >> some correction for individual non-reponse. The MIS2 document says >> nothing about that, but you should compare the two weights. >> >> Steve >> >> Steven J. Samuels >> sjsamuels@gmail.com >> 18 Cantine's Island >> Saugerties NY 12477 >> USA >> Voice: 845-246-0774 >> Fax: 206-202-4783 >> >>> >>> (apologies to those I spam'ed earlier with private emails- FAQ! FAQ!). >>> >>> I'm attempting to use a 2006 Malaria Indicator cluster survey, >>> administered by the DHS in Angola; Stata 11.1 on a Mac. >>> >>> It appears that a quite complex stratification and clustering process >>> was used, and we are uncertain of the svy:set necessary. We've applied >>> the sample weight correction (divide by 1e6), and have played with >>> various other strata besides the "stratum" var in DHS, which other >>> posts here have suggested is a vestigial data field. We are getting >>> wildly different ORs with different cluster settings, and so.... >>> >>> The current settings, almost certainly not correct: >>> >>> pweight: sampwgt (= HV005 "sample weight")/1e6) >>> VCE: linearized >>> Single unit: missing >>> Strata 1: stratum (= HV0022 "sample stratum number", or HV025 >>> "rural/urban" or HV024 "Region") >>> SU 1: PSU (= HV021 "Primary sampling unit") >>> FPC 1: <zero> >>> >>> Other fields like HV001 (Cluster number), HV002 (Household number) are >>> not being utilized (as per DHS suggestion). >>> The full DHS report (sampling info in Appendix A) at >>> measuredhs(dot)com/pubs/pdf/MIS2/MIS2(dot)pdf >>> >>> Any ideas or suggestions? >>> cheers- >>> Andrew >>> >>> * >>> * 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/ > -- Andrew * * 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/

**Follow-Ups**:**Re: st: Cluster Survey DHS Parameterization***From:*Drew Lover <graupel75@gmail.com>

**References**:**st: Cluster Survey DHS Parameterization***From:*Drew Lover <graupel75@gmail.com>

**Re: st: Cluster Survey DHS Parameterization***From:*Steve Samuels <sjsamuels@gmail.com>

**Re: st: Cluster Survey DHS Parameterization***From:*Steve Samuels <sjsamuels@gmail.com>

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