DOI: 10.5255/ukda-sn-6676-14
title: Understanding Society: Waves 1-11, 2009-2020 and Harmonised BHPS: Waves 1-18, 1991-2009: Secure Access
title: Understanding Society: Waves 1- , 2008-: Secure Access
title: United Kingdom Household Longitudinal Study; UKHLS

description: &lt;p&gt;Understanding Society (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; &lt;p&gt;For full details of the main Understanding Society study, see SN 6614.&lt;strong&gt;&lt;br&gt; &lt;/strong&gt;&lt;/p&gt; &lt;p&gt;&lt;strong&gt;Secure Access Dataset:&lt;/strong&gt;&lt;br&gt; &lt;/p&gt; &lt;p&gt;&lt;span&gt;The &lt;em&gt;&lt;span&gt;Understanding Society: Waves 1-11, 2009-2020 and Harmonised BHPS: Waves 1-18, 1991-2009: Secure Access&lt;/span&gt;&lt;/em&gt; dataset 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). Grid references are presented in terms of Eastings and Northings, which are distances in metres (east and north, respectively) from the origin (0,0), which lies to the west of the Scilly Isles. Each grid reference is given a positional quality indicator to denote the accuracy of the grid reference. In the majority of cases, the assigned grid reference relates to the building of the matched address closest to the postcode mean. The grid references provided for Northern Ireland postcodes use the Irish National Grid system that covers all of Ireland and is independent of the British National Grid. No grid references are provided for postcodes in the Channel Islands and the Isle of Man.&lt;br&gt; &lt;br&gt; The Secure Access version includes all files in the Special Licence version (see SN 6931), plus files that contain 3 variables relating to the National Grid Reference for each household: Easting, Northing and positional quality indicator (OSGRDIND). The Secure Access version also includes data files with full dates of birth for Understanding Society and BHPS respondents. &lt;/span&gt;&lt;br&gt; &lt;br&gt; &lt;strong&gt;Related UK Data Archive studies&lt;/strong&gt;:&lt;br&gt; The Secure Access version of the dataset has more restrictive access conditions than standard End User Licence or Special Licence access datasets (see 'Access' section below). Further details and links to the less restrictive versions can be found on the &lt;a title="Understanding Society series" href="http://discover.ukdataservice.ac.uk/series/?sn=2000053"&gt; Understanding Society series&lt;/a&gt; Key data page.&lt;/p&gt; &lt;span&gt;&lt;span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt; &lt;p&gt;&lt;/p&gt; &lt;p&gt;&lt;strong&gt;Latest edition information&lt;/strong&gt;&lt;/p&gt; &lt;p&gt;&lt;/p&gt; &lt;p&gt;For the 14th edition (September 2022) a new crosswave file xhhrel (also known as the Family Matrix) has been added that identifies all family relationships across the study. In addition, two new International Standard Classification of Education (ISCED) variables have been added. There are also weights changes, especially related to child weights. Other minor changes and corrections have also been made to Waves 1-11. &lt;a name="x__Hlk86419052"&gt;Please refer to the revisions document for full details.&lt;/a&gt;&lt;/p&gt; &lt;span&gt;&lt;/span&gt; &lt;p&gt;&lt;/p&gt; &lt;p&gt;&lt;/p&gt; &lt;p&gt;&lt;strong&gt;Suitable data analysis software&lt;/strong&gt;&lt;br&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;