DOI: 10.5255/ukda-sn-6614-19
title: Understanding Society: Waves 1-13, 2009-2022 and Harmonised BHPS: Waves 1-18, 1991-2009
title: Understanding Society: Waves 1- , 2008-
title: United Kingdom Household Longitudinal Study; UKHLS

description: &lt;p&gt;&lt;span style="font-style: italic;"&gt;Understanding Society&lt;/span&gt;, (UK Household Longitudinal Study), which began in 2009, is conducted by the Institute for Social and Economic Research (ISER) at the University of Essex and the survey research organisations Kantar Public and NatCen. It builds on and incorporates, the British Household Panel Survey (BHPS), which began in 1991.&lt;/p&gt; 
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&lt;p&gt;This release combines thirteen waves of Understanding Society data with harmonised data from all eighteen waves of the BHPS. As multi-topic studies, the purpose of Understanding Society and BHPS is to understand the short- and long-term effects of social and economic change in the UK at the household and individual levels. The study has a strong emphasis on domains of family and social ties, employment, education, financial resources, and health. Understanding Society is an annual survey of each adult member of a nationally representative sample. The same individuals are re-interviewed in each wave approximately 12 months apart. When individuals move they are followed within the UK and anyone joining their households is also interviewed as long as they are living with them. The study has five sample components: the general population sample; a boost sample of ethnic minority group members; an immigrant and ethnic minority boost sample (from wave 6); participants from the BHPS; and the Innovation Panel (which is a separate standalone survey (see SN 6849). The fieldwork period is for 24 months. Data collection uses computer-assisted personal interviewing (CAPI) and web interviews (from wave 7) and includes a telephone mop-up. From March 2020 (the end of wave 10 and 2nd year of wave 11), due to the coronavirus pandemic, face-to-face interviews were suspended, and the survey has been conducted by web and telephone only but otherwise has continued as before. Face-to-face interviewing was resumed from April 2022. One person completes the household questionnaire. Each person aged 16 or older participates in the individual adult interview and self-completed questionnaire. Youths aged 10 to 15 are asked to respond to a self-completion questionnaire. For the general and BHPS samples biomarker, genetic and epigenetic data are also available. The biomarker data, and summary genetics and epigenetic scores, are available via UKDS (see SN 7251); detailed genetics and epigenetics data are available by application (see below). In 2020 an additional frequent web survey was separately issued to sample members to capture data on the rapid changes in people’s lives due to the COVID-19 pandemic (see SN 8644).&lt;/p&gt;
&lt;p&gt;Further information may be found on the Understanding Society main stage webpage and links to publications based on the study can be found on the Understanding Society Latest Research webpage.&lt;/p&gt;&lt;p&gt;
&lt;strong&gt;End User Licence, Special Licence and Secure Access versions:&lt;/strong&gt;&lt;/p&gt;&lt;p&gt;There are two versions of the main &lt;em&gt;Understanding Society&lt;/em&gt; data. One is available under the standard End User Licence (EUL) agreement, and the other is a Special Licence (SL) version. The SL version contains additional month of birth variables, more detailed country and occupation coding for a number of variables and various income variables have not been top-coded (see the documentation available with the SL version or the &lt;em&gt;Understanding Society&lt;/em&gt; website for more detail on these and other differences). Users are advised to first obtain the standard EUL version of the data to see if they are sufficient for their research requirements. The SL data have more restrictive access conditions; prospective users of the SL version will need to complete an extra application form and demonstrate to the data owners exactly why they need access to the additional variables in order to get permission to use that version. The SL versions of the main Understanding Society and Innovation Panel studies may be found under SNs 6931 and 7083 respectively. &lt;br&gt;
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&lt;p&gt;Low- and Medium-level geographical identifiers are also available subject to SL access conditions; see SNs 6666, 6668-6675, 7453-4, 7629-30, 7245, 7248-9 and 9169-9170 (mainstage study) and 6908-6916, 7339, 7637-41, 9157 and 9159 (Innovation Panel). Schools data are available subject to SL access conditions in SN 7182. Higher Education establishments for Wave 5 are available subject to SL access conditions in SN 8578. Interviewer Characteristics data, also subject to SL access conditions is available in SN 8579. In addition, a fine detail geographic dataset (SN 6676) is available under more restrictive Secure Access conditions that contains British National Grid postcode grid references (at 1m resolution) for the unit postcode of each household surveyed, derived from the ONS National Statistics Postcode Directory (NSPD). For details on how to make an application for Secure Access dataset, please see the SN 6676 catalogue record.&lt;br&gt;
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&lt;strong&gt;How to access genetic and/or bio-medical sample data :&lt;/strong&gt;&lt;/p&gt;
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&lt;p&gt;Information on how to access genetics and epigenetics data, directly from the study team, is available on the website:
&lt;a href="https://www.understandingsociety.ac.uk/documentation/health-assessment/accessing-data/genetics-application"&gt;
https://www.understandingsociety.ac.uk/documentation/health-assessment/accessing-data/genetics-application&lt;/a&gt;.&lt;/p&gt;
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&lt;p&gt;&lt;strong&gt;Latest edition information&lt;/strong&gt;&lt;/p&gt;
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&lt;p&gt;For the 18th edition (November 2023), Wave 13 data and documentation have been added. Other minor changes and corrections have also been made to Waves 1-12. Please refer to the revisions document for full details.&lt;/p&gt;
&lt;strong&gt;Suitable data analysis software&lt;/strong&gt;
&lt;p&gt;These data are provided by the depositor in Stata format. Users are strongly advised to analyse them in Stata. Transfer to other formats may result in unforeseen issues. Stata SE or MP software is needed to analyse the larger files, which contain over 2,047 variables.&lt;/p&gt;
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