Biomedical subjects

O Duke-williams

Publications and source records attributed to O Duke-williams.

4 recordsLinked to original sources

PubMed1998

Can census offices publish statistics for more than one small area geography? An analysis of the differencing problem in statistical disclosure.

"The paper describes a problem faced by National Statistical Offices when publishing the results of decennial censuses for small geographical areas. If they publish statistical tables for two or more sets of areas, users can compare the tables and produce new statistics for the areas formed by differencing, which may have populations below confidentiality thresholds. To investigate the problem, the authors construct a software system and carry out a series of experiments using a large synthetic population base for Yorkshire and Humberside [in England]. The results indicate that publishing statistics for zones close in size to the primary areas is not safe unless the zones have been carefully designed. However, publishing statistics for sufficiently large areas such as 5km grid squares or postal sectors alongside enumeration districts is safe."

Censuses↗

PubMed1997

Methods for estimating missing data on migrants in the 1991 British census.

"This paper discusses the use of suppression to protect data in the Special Migration Statistics, a dataset produced from the 1991 [British] Census, and argues that this procedure prevents accurate analysis of the data. A computer program is described that uses a series of methods to ¿recover' data which were suppressed, and to estimate those parts of the data which cannot be recovered.... The program has been used to recover and estimate data successfully, and results include sample tables of migrants between types of districts by ethnicity."

Censuses↗

PubMed1995

The story of the British special migration statistics.

"This paper describes a new data set from the 1991 Census called the Special Migration Statistics. Before release for general use by the U.K. social science and geographic community, it was essential to understand and to thoroughly check the data. This paper reports on the structure of the database and the checks carried out to verify its internal and external consistency. Finally, the paper summarises the pattern of migration revealed by the statistics for two illustrative spatial systems: wards in a large northern city and regions in Great Britain." The focus is on internal migration.

Censuses↗

PubMed1995

Time series migration in Britain: the context for 1991 census analysis.

"An administrative register, the National Health Service Central Register (NHSCR), is used by the Census Office (OPCS) to produce counts of NHS patients re-registering in different Family Health Service Authorities (FHSAs) in England and Wales. These movement data can be used to establish how unique or typical the migration occurring in the year prior to the Census was in relation to that for the whole decade. This paper examines national, regional and local examples of the information that can be extracted from a database system called TIMMIG that provides access to an NHSCR migration time series and a parallel series of mid-year population estimates. In advance of the publication of Special Migration Statistics, a preliminary comparison is made between the levels of in-migration to FHSA areas recorded in the NHSCR and in the 1991 Census."

Data Collection↗