Support #1975: Weights - Cross-sectional Analysis on LAD level - Understanding Society User Support

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Support #1975

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Weights - Cross-sectional Analysis on LAD level

Added by Caitlin Schmid over 1 year ago. Updated about 1 year ago.

Status:

Resolved

Priority:

Normal

Assignee:

Olena Kaminska

Category:

Data analysis

Start date:

09/19/2023

% Done:

100%

Description

Good morning,

Using the main survey, I aim to run a cross-sectional analysis on a number of variables to analyse sex differences between adults and their variation across Local Authority Districts. To increase the sample sizes, I want to pool UKHLS Waves 11 and 12. Do I require tailored weights or can I proceed with the two provided cross-sectional adults weights of the respective waves (_indinui_xw)?

Many thanks and best wishes,

Caitlin

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Updated by Understanding Society User Support Team over 1 year ago

Status changed from New to In Progress
Assignee changed from Understanding Society User Support Team to Olena Kaminska
% Done changed from 0 to 10
Private changed from Yes to No

Many thanks for your enquiry. The Understanding Society team is looking into it and we will get back to you as soon as we can. We aim to respond to simple queries within 48 hours and more complex issues within 7 working days.

Best wishes,
Understanding Society User Support Team

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Updated by Olena Kaminska over 1 year ago

Caitlin,

If you think about sex as a stable characteristic that does not change, then I am not sure that pooling is a right option for you. As technically you will have each person twice if you pool over 2 waves. If you take this into account correctly your effective sample size will be identical to the situation of using people only once. If you see that with pooled analysis your variance and CIs are smaller, then most likely you didn't take the data structure correctly into account. In other words you should have 0 gain in sample size from using 2 waves (if you correctly identify the data structure in your syntax).
This may change if you think that sex changes over time, especially if this change is substantial in a relatively large part of the population over 2 year period of time.

Hope this helps,
Olena

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