https://iserredex.essex.ac.uk/support/https://iserredex.essex.ac.uk/support/support/favicon.ico?15995719382019-03-13T12:01:14ZUnderstanding Society User SupportUnderstanding Society User Support - Support #1159: Weights for cross-sectional and longitudinal analyseshttps://iserredex.essex.ac.uk/support/issues/1159?journal_id=42792019-03-13T12:01:14ZOlena Kaminskaolena@essex.ac.uk
<ul></ul><p>Luca,</p>
<p>Thank you for your question. <br />If you are interested in estimates in a particular time point - you should use cross-sectional weights. In other words if you estimate the same model for each wave separately and you include only information from that particular wave in the model - you should use the cross-sectional weight from that wave.<br />If you are using information from across a few waves - you should use a longitudinal weight from the last wave in your analysis. <br />The change in definition at wave 6 relates to immigrants: from wave 6 'ui' weights include immigrants since 2009 but 'ub' weights don't include them. This is only relevant if you put together many cross-sectional estimates and compare them over time (e.g. looking at a trend). This does not influence longitudinal analysis. If you want to be sure to have comparable cross-sectional estimates (i.e. those that exclude immigrants since 2009) then you can use 'ub' weights throughout.</p>
<p>Hope this helps,<br />Olena</p> Understanding Society User Support - Support #1159: Weights for cross-sectional and longitudinal analyseshttps://iserredex.essex.ac.uk/support/issues/1159?journal_id=42802019-03-13T13:39:15ZLuca Bernardiluca.bernardi@uab.cat
<ul></ul><p>Dear Olena,</p>
<p>Many thanks for replying so quickly. That's very helpful. If I understand correctly, since I am using information from across a few waves, I can apply the "indinub_lw" weight. Is this correct?</p>
<p>Thanks and best wishes,<br />Luca</p> Understanding Society User Support - Support #1159: Weights for cross-sectional and longitudinal analyseshttps://iserredex.essex.ac.uk/support/issues/1159?journal_id=42812019-03-13T16:26:08ZOlena Kaminskaolena@essex.ac.uk
<ul></ul><p>Luca,</p>
<p>Yes, the weight is correct, and it should come from the last wave that you use in your analysis. Note, 'ub_lw' weight is available for analysis from wave 2 onwards.</p>
<p>Olena</p> Understanding Society User Support - Support #1159: Weights for cross-sectional and longitudinal analyseshttps://iserredex.essex.ac.uk/support/issues/1159?journal_id=42822019-03-13T16:30:47ZLuca Bernardiluca.bernardi@uab.cat
<ul></ul><p>Dear Olena,</p>
<p>Sounds good. Many thanks again.</p>
<p>Luca</p> Understanding Society User Support - Support #1159: Weights for cross-sectional and longitudinal analyseshttps://iserredex.essex.ac.uk/support/issues/1159?journal_id=42832019-03-14T13:20:36ZStephanie Autys.auty@essex.ac.uk
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