British Crime Survey, 2007-2008

<p><i>Background</i>:<br> The <i>Crime Survey for England and Wales</i> (CSEW), previously known as the <i>British Crime Survey</i> (BCS), has been in existence since 1981. The survey traditionally asks a sole randomly selected adult, in a random sample of households, details pertaining to any instances where they, or the household, has been a victim of a crime in the previous 12 months. These are recorded in the victim form data file (VF). A wide range of questions are then asked covering demographics and crime-related subjects such as attitudes to the police and the criminal justice system (CJS). Most of the questionnaire is completed in a face-to-face interview in the respondent's home; these variables are contained within the non-victim form (NVF) data file. Since 2009, the survey has been extended to children aged 10-15 years old; one resident of that age range has also been selected at random from the household and asked about incidents where they have been a victim of crime, and other related topics. The first set of children's data, covering January-December 2009, had experimental status, and is held separately under SN 6601. From 2009-2010, the children's data cover the same period as the adult data and are included with the main dataset. Further information may be found on the ONS <a href="https://www.ons.gov.uk/surveys/informationforhouseholdsandindividuals/householdandindividualsurveys/crimesurveyforenglandandwales" title="Crime Survey for England and Wales">Crime Survey for England and Wales</a> web page and for the previous BCS, from the GOV.UK <a href="https://www.gov.uk/government/statistics/british-crime-survey-methodology" title="BCS Methodology">BCS Methodology</a> web page.<br><i><br>Self-completion data<br></i>A series of questions on drinking behaviour, drug use, self-offending, gangs and personal security, and intimate personal violence (IPV) (including stalking and sexual victimisation) are administered to adults via a self-completion module which the respondent completes on a laptop computer. Children aged 10-15 years also complete a separate self-completion questionnaire. The questions are contained within the main questionnaire documents, but the data are not available with the main survey; they are available only under Secure Access conditions (see SN 7280). <br><i><br>Geographic variables</i>:<br>From 2008-2009, low-level geographic variables are available under Secure Access conditions to match to the survey/ From 2011-2012 onwards, further lower-level geographic variables are also available under Secure Access conditions.<br><i><br>History</i>:<br>Up to 2001, the survey was conducted biennially. From April 2001, interviewing was carried out continually and reported on in financial year cycles and the crime reference period was altered to accommodate this change. The core sample size has increased from around 11,000 in the earlier cycles to over 46,000 up until 2011/12 where it was then reduced to 35,000. Following the National Statistician's Review of Crime Statistics in June 2011 the collation and publication of Crime Statistics moved to the Office for National Statistics (ONS) from 1st April 2012, and the survey changed its name to the <i>Crime Survey for England and Wales</i> (CSEW) accordingly.<br><i><br>Scottish data</i>:<br>The 1982 and 1988 BCS waves were also conducted in Scotland. The England and Wales data for 1982 and 1988 are held at the UKDA under SNs 1869 and 2706, but the Scottish data for these studies are held separately under SNs 4368 and 4599. Since 1993, separate <i>Scottish Crime and Justice Surveys</i> have been conducted, and these are held under GN 33330.<br><br><span style="font-style: italic;">New methodology for capping the number of incidents from 2017-18<br></span>The CSEW datasets available from 2017-18 onward are based upon a new methodology of capping the number of incidents at the 98th percentile. Incidence variables names have remained consistent with previously supplied data but due to the fact they are based on the new 98th percentile cap, and old data sets are not, comparability has been lost with previous years. More information can be found in the 2017-18 User Guide and the article ‘Improving victimisation estimates derived from the Crime Survey for England and Wales’. ONS intend to publish all micro data back to 1981 with incident data based on the 98th percentile cap later in 2019.</p> For the fourth edition (May 2009), a new version of the interpersonal violence (IPV) data file was deposited, with variables PV3a to PV3o corrected. From October 2016, the self-completion questionnaire modules on IPV are subject to Controlled data access conditions - see SN 7280.<br> <br>背景： 英格兰和威尔士犯罪调查（Crime Survey for England and Wales, CSEW）前身为英国犯罪调查（British Crime Survey, BCS），自1981年起开展至今。该调查传统上会从随机抽取的家庭中选取一名成年受访者，询问其本人或家庭成员在过去12个月内遭遇犯罪侵害的相关细节，此类信息会被记录至受害人问卷数据文件（Victim Form Data File, VF）中。后续还会设置一系列涵盖人口统计学特征及犯罪相关主题的问题，例如对警方及刑事司法系统（Criminal Justice System, CJS）的态度等。大部分问卷内容会通过受访者家中的面对面访谈完成，此类变量收录于非受害人问卷数据文件（Non-Victim Form Data File, NVF）中。 2009年起，调查范围拓展至10至15岁的儿童：会从家庭中随机抽取一名该年龄段的居民，询问其本人遭遇犯罪侵害及其他相关话题的情况。2009年1月至12月的首批儿童调查数据处于试验阶段，以单独序列编号SN 6601存储。2009至2010年度的儿童调查数据与成人调查数据周期一致，并入主数据集。更多相关信息可访问英国国家统计局（Office for National Statistics, ONS）的英格兰和威尔士犯罪调查官方页面，以及英国政府官网（GOV.UK）的英国犯罪调查方法学官方页面获取。 自填式问卷数据： 针对成年人的调查包含一系列通过笔记本电脑完成的自填式模块问题，内容涉及饮酒行为、药物使用、自我伤害、帮派活动、人身安全以及亲密伴侣暴力（Intimate Personal Violence, IPV，包括跟踪骚扰与性侵害）。10至15岁的儿童也需填写独立的自填式问卷。上述问题收录于主问卷文档中，但相关数据并未随主调查数据集一并公开，仅可通过安全访问权限（Secure Access）获取（详见SN 7280）。 地理变量： 2008至2009年度起，可通过安全访问权限获取用于匹配调查数据的低层级地理变量；2011至2012年度起，还可额外获取更多层级更低的地理变量，同样需通过安全访问权限获取。 调查历史： 2001年以前，该调查每两年开展一次。2001年4月起，调查转为持续进行，并以财政年度为周期发布报告，同时调整了犯罪统计的参考周期以适配这一变更。核心样本量从早期循环的约11000份逐步增至2011/12年度的46000余份，随后缩减至35000份。2011年6月英国国家统计师对犯罪统计开展审查后，犯罪数据的整理与发布工作自2012年4月1日起移交至英国国家统计局（Office for National Statistics, ONS），该调查也正式更名为英格兰和威尔士犯罪调查（CSEW）。 苏格兰相关数据： 1982年与1988年的英国犯罪调查（BCS）轮次也曾在苏格兰开展。1982年与1988年的英格兰和威尔士数据由英国数据档案馆（UK Data Archive, UKDA）以序列编号SN 1869、SN 2706存储，而同期的苏格兰调查数据则以SN 4368、SN 4599单独存储。1993年起，苏格兰开始独立开展苏格兰犯罪与司法调查，相关数据以GN 33330存储。 2017至2018年度起实施的案件数量封顶新方法： 2017至2018年度及之后公开的CSEW数据集采用了将案件数量封顶至第98百分位数的新方法。事件类变量名称与此前公开的数据保持一致，但由于新数据集基于第98百分位数封顶规则，而旧数据集未采用该规则，因此与往年数据不再具备可比性。更多相关信息可查阅《2017-2018年度使用指南》及文章《改进基于英格兰和威尔士犯罪调查的被害估计方法》。英国国家统计局（ONS）计划于2019年晚些时候发布所有可追溯至1981年的微观数据，其中案件数据均采用第98百分位数封顶规则。 2009年5月发布的第四版数据中，亲密伴侣暴力（IPV）数据文件更新了版本，修正了PV3a至PV3o变量。2016年10月起，亲密伴侣暴力相关的自填式问卷模块需遵循受控数据访问条件——详见SN 7280。