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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: patterns of missing data by interviewers |

Date |
Sun, 22 Jul 2007 16:53:08 +0100 |

You should give information on, or examples of, your variables and data structure. I can't see any here. You should also -update- to Stata 9.2. Nick n.j.cox@durham.ac.uk Govind Bell Acharya > It's my first post and I'll try to make this as detailed as > possible, so > I apologize if this needs clarification: > > For our research, we use telephone interviewers to conduct a > number of > surveys. At the moment, it is a challenge to detect whether > the number > of items where the interviewer coded the missing data (don't know or > refused options) is above or below the overall mean of > missing values. > I did something like that using the proc sql command in SAS, > but it is > (as SAS is in general), extremely unwieldy and creates major > issues such > as (f) below. In any case, here is what I have in mind > > (a)Name (b)# surveys complete (c)# missing (d)# > questions asked > (e) (c)/(d) (f) [sum of (c)]/[sum of (d)] (g) [(e)-(f)] > John Doe 12 5 > 120 > 5/120 7/200 > > > Mary Sue 8 2 > 80 > 2/80 7/200 > > > > (a) The name of the interviewer; > (b) number of completions for each interviewer; > (c) the raw number of missing numbers totaled for each > interviewer (so I > guess I would code 0 as nonmissing and 1 as missing and sum them by > interviewer); > (d) The total number of questions asked by the interviewer > (so if it's a > 10 question survey and they completed 8 surveys, they asked > 80 questions); > (e) (c)/(d) is the percentage of missing by interviewer; > (f) This is the overall mean of missing data across questions > asked and > across interviewers. This was something that I have been > doing by hand > in SAS-- I will run the program, then count the total > missing, then go > into the code and put those numbers in, which is of course a > weird way > of doing this; > (g) the difference between (e) and (f) > > I am pretty well versed in Stata, but an beginner to advanced > beginner > level in the programming aspects. I use Stata 9. * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: patterns of missing data by interviewers***From:*Govind Bell Acharya <ga47@cornell.edu>

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