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Hints and Tips on using the Scottish Household Survey data

Hints and Tips on using the Scottish Household Survey data. Steven Hope, Ipsos MORI Mairi MacAskill, SHS Project Manager. Background. Over the past eight years the survey has collected data on 120,000 households The data are considered to be complex to analyse SHS Lite

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Hints and Tips on using the Scottish Household Survey data

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  1. Hints and Tips on using the Scottish Household Survey data Steven Hope, Ipsos MORI Mairi MacAskill, SHS Project Manager

  2. Background • Over the past eight years the survey has collected data on 120,000 households • The data are considered to be complex to analyse • SHS Lite • Thousands of variables every year • However there is get potential for secondary analysis

  3. Limitations • Sample Survey • Covers private households only • Is not designed to give results below local authority level • More sophisticated statistical analysis is problematic due to sample design • Limited on some topics – e.g. income

  4. SHS Lite vs Full SHS • Intended as an easier entry point to SHS analysis • Key differences • Multi-code and ‘loop’ variables summarised • Many detailed variables removed • Individual components of income • Details of all household members • Variables organised into analysis sets

  5. Unit of analysis • Know what level the information was collected at • Household • Person • Random Adult • Random Schoolchild

  6. Data Structure The Data Archive data is in one flat file – i.e. one record for each household; • When analysing Random Adult data there will be around 10% of cases missing • When analysing at person level the data will have to be transposed

  7. Weighting • Almost all analysis needs to be weighted • La_wt – local authority weight, to be used for household analysis • Ind_wt – Individual weight, to be used for adult level analysis • Other weights for random schoolchild and journey or stage level analysis • Mixing variables • Variation in internet use by tenure – tenure is a household characteristic. Internet use is collected from the random adult. Weighting?

  8. Routing & Streaming Respondents can be either • Routed around – the question is not appropriate based on previous answers • Streamed out – question asked of a sub-sample to save space • Pre-2007 – variable “RANVER” • 2007 onwards – variable “STREAM”

  9. Using SPSS syntax • Many advantages over the menu system • Analysis can be checked and repeated • Previous analysis can be edited and reused • Faster – run batches on one pass of the data • More options available • Paste from menus to see structure • Copy and amend annual report syntax

  10. Questions?

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