Study Number 5686 - Annual Population Survey, January - December, 2006: Special Licence Access
NEW EDITION INFORMATION
- For the second edition (October 2007), a new version of the data file was deposited, with corrections made to variables AgedFe and LevQua2.
- For the third edition (June 2008), a new version of the data file, reweighted to the latest (2007-2008) population estimates, was deposited. See documentation for further details of reweighting. The data file includes a new weighting variable, PWT07, and variable Wkag1664, covering working age 16-64. In addition, variables quals401-11 have been dropped from the file.
- For the fourth edition (July 2008) a new version of the reweighted data file (see third edition) was deposited, with amendments made to the variables Levqua2, Hiqual5 and AgedFe. Users of the third edition are advised to obtain the new version.
- For the fifth edition (May 2010), the data have been weighted using the latest population estimates (2009), and an updated weighting variable pwt09, is included in the dataset. In addition, variables diffhr, marstt and restemr are no longer included in the dataset. Further details about the 2009 APS/LFS reweighting project may be found in the documentation.
- For the sixth edition (January 2012), the data have been weighted to 2010 population figures. The new weighting variable is PWTA10 (APS Person weight) accordingly. In addition, variable wkag1664 has been removed, and the following variables added: relhrp (valid cases), diffhr, marstt, numsce, quals401-11, and restemr (all cases set to missing).
DATA PROCESSING NOTES
Data Archive Processing Standards
The data were processed to the UK Data Archive's A standard. A rigorous and
comprehensive series of checks was carried out to ensure the quality of the data
and documentation.�Firstly, checks were made that the number of cases and
variables matched the depositor's records. Secondly, checks were made that all
variables had variable labels and all nominal (categorical) variables had value
labels. Where possible, either with reference to the documentation and/or in
communication with the depositor, absent labels were created. Thirdly, logical
checks were performed to ensure that nominal (categorical) variables had values
within the range defined (either by value labels or in the depositor's
documentation). Lastly, any data or documentation that breached confidentiality
rules were altered or suppressed to preserve anonymity.
All notable and/or outstanding problems discovered are detailed under the 'Data
and documentation problems' heading below.
Data and documentation problems
Variable FAMLY031 displays unlabelled values of 6 and 7.
Variables AOHL19 and AYHL19 both contain a stray value of 28.
Data conversion information
From January 2003 onwards, almost all data conversions have been performed using software developed by the UK Data Archive. This enables standardisation of the conversion methods and ensures optimal data quality. In addition to its own data processing/conversion code, this software uses the SPSS and StatTransfer command processors to perform certain format translations. Although data conversion is automated, all data files are also subject to visual inspection by a member of the Archive�s Data Services team.
With some format conversions, data, and more especially internal metadata (i.e. variable labels, value labels, missing value definitions, data type information), will inevitably be lost or truncated owing to the differential limits of the proprietary formats. A UK Data Archive Data Dictionary file (generally in Rich Text Format (RTF)) is usually provided for each data file, enabling viewing and searching of the internal metadata as it existed in the originating format. These
files are called:
[data file name]_UKDA_Data_Dictionary.rtf
Important information about the data format supplied
The links below provide important information about the Archive's data
supply formats. Some of this information is specific to the ingest
of the data, i.e. the format in which the Archive received the data
from the depositor. The ingest format for this study was
Please follow the appropriate link below to see information on your chosen supply (download)
Tab-delimited text (*.tab)
MS Excel (*.xls/*.xslx)
SAS (*.sas7bdat and *.sas)
MS Access (*.mdb/*.mdbx)
Conversion of documentation formats
The documentation supplied with Archive studies is usually converted to Adobe Portable Document Format (PDF), with documents bookmarked to aid navigation. The vast majority of PDF files are generated from MS Word, RTF, Excel or plain text (.txt) source files, though PDF documentation for older studies in the collection may have been created from scanned paper documents. Occasionally, some documentation cannot be usefully converted to PDF (e.g. MS Excel files with wide worksheets) and this is usually supplied in the original or a more appropriate format.