International Passenger Survey, 2015

The data cover four subject areas, termed 'Airmiles', 'Alcohol', 'Qregtown' and 'Qcontact'. One file is produced each quarter per subject area, and the dataset updated quarterly. These files can be joined together using the variables YEAR, SERIAL, FLOW and QUARTER.<br>
<br>
The depositor recommends that only expert users who are very familiar with the coding and weighting structures use these data, as limited support is available. Some considerable understanding of the data is required before meaningful analyses can be made; care must be taken when performing time series operations as codes can vary from year to year and not all variables from one year's dataset are used in other years. <br>
<br>
<b>Weighting the IPS</b><br>
ONS advise that the variable 'fweight' included in the 'Qcont' dataset should be applied to get an overall weighted profile. This weight is set consistently over time. Other weights are provided to analyse finer detail but no information is provided in the documentation. ONS is currently reviewing the documentation but in the meantime if users have any detailed weighting questions they should contact ONS at: [e-mail].<br>
<br>
<b>Data contents</b><br>
For the fourth edition (June 2016) the data and documentation were updated to cover the whole year for 2015.<br>
<br>
The <i>International Passenger Survey</i> (IPS) aims to collect data on both credits and debits for the travel account of the Balance of Payments, provide detailed visit information on overseas visitors to the United Kingdom (UK) for tourism policy, and collect data on international migration.<br>

本数据集涵盖四大主题领域，分别为航空里程（Airmiles）、酒类（Alcohol）、Qregtown与Qcontact。每个主题领域每季度生成一份数据文件，数据集亦按季度进行更新。上述文件可通过变量YEAR、SERIAL、FLOW及QUARTER进行合并。

数据集提供者建议，仅对编码体系与加权规则极为熟悉的专业用户方可使用本数据集，因配套支持资源较为有限。开展有意义的分析前，需对本数据集具备充分的理解；进行时间序列操作时需格外谨慎，因编码规则可能逐年变动，且某一年度数据集包含的部分变量未必适用于其他年份。

<b>IPS加权说明</b>
英国国家统计局（ONS）提示，「Qcont」数据集内的「fweight」变量可用于生成整体加权分布结果，该权重在时间维度上保持统一。另有其他权重用于细分维度的分析，但相关说明未在文档中提供。英国国家统计局目前正在修订相关文档，在此期间若用户有详细的加权相关疑问，请发送邮件至[e-mail] 与英国国家统计局取得联系。

<b>数据内容说明</b>
2016年6月发布的第四版数据与文档已更新至覆盖2015全年。

<i>国际旅客调查（International Passenger Survey，IPS）</i>旨在收集国际收支旅游账户的借贷方数据，为英国（UK）旅游政策提供赴英海外访客的详细访问信息，并采集国际移民相关数据。