Understanding Society User Support: Issueshttps://iserredex.essex.ac.uk/support/https://iserredex.essex.ac.uk/support/support/favicon.ico?15995719382020-04-01T09:22:44ZUnderstanding Society User Support
Redmine Understanding Society User Support - Support #1329 (Resolved): Enumeration of strata variable and https://iserredex.essex.ac.uk/support/issues/13292020-04-01T09:22:44ZAndreas Wejs Andersen
<p>Dear Support</p>
<p>I have two questions regarding strata formation and clustering in analysis:</p>
<p>1. After reading Lynn (2009) - Sample Design for Understanding Society (and consulting both your online class and the manual), I am left with a question regarding the enumeration of strata seen in the variable 'strata'. This surely comes down to my a lapse in understanding of the survey design. <br />For the GPS Lynn details the stratification of postal code into 103 distinct strata (12 regions X 3 SEG-bands X 3 pop. density bands), however when tabulating Strata for GPS members in wave 1 of UKHLS I see 1200 strata. Where is the disconnect?<br />I also find a discrepancy between strata_bh and the characterization given in Lynn (2006) "Quality Profile: British Household Panel Survey". Lynn details 82 minor strata while the strata_bh variable takes 75 values at wave 1 of BHPS.</p>
<p>2. Should I specify two levels of clustering if studying individuals (say in stata svy enviroment)?<br />If my interest is in individuals (adult respondents), then for the GPS my current understanding of the structure is: 1. Postal codes are translated into sectors which are sorted into 103 strata. 2. PSU's are drawn (first clustering level) with proportionate probability, 3. Addresses/delivery points are drawn at random from PSU (second level of clustering?) with correction for multiple household at the same address.</p>
<p>I would be thankful for any help you could provide<br />Andreas W. Andersen</p>