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CIDS

Census interaction data: from CIDS to CIDER John Stillwell School of Geography, University of Leeds, CIDS Director and UPTAP Coordinator.

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CIDS

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  1. Census interaction data: from CIDS to CIDERJohn StillwellSchool of Geography, University of Leeds, CIDS Director and UPTAP Coordinator Third International Conference on Population Geographies organised by the RGS-IBG Population Geography Research Group at the University of Liverpool, 19-21 June 2006

  2. CIDS • Census Interaction Data Service • ESRC/JISC funded Data Support Unit under the Census Programme 2001-2006-2011 • Provides registered users throughout the UK with access to census origin-destination migration and commuting statistics • Overall aim is to encourage more use to be made of these data sets • Web-based Interface to Census Interaction Data (WICID) is the online access system

  3. Presentation 1 Introduction Census interaction data Developments from 1991 CIDS data holdings 2 WICID: How does it work? Building queries Analysis tools 3 From CIDS to CIDER CIDS useage CIDER objectives 4 UPTAP Overview

  4. 1 Introduction:Census interaction data • SMS/SWS/STS involve migration and commuting flow data involving two geographies: origins and destinations • Extremely rich data sets for use by researchers and practitioners • Especially valuable because of lack of alternative data sources, especially below district scale • Territorially comprehensive and reasonably reliable • Tell us many things about mobility patterns, place connectivity and behavioural processes

  5. Example:Patterns of net migration for London boroughs, 2000-01 Aggregate rates of net migration show losses from all but three boroughs (& City of London) Source: 2001 Census SMS level 1

  6. The importance of disaggregating net migration for London boroughs, 2000-01 Net rates of migration for boroughs within London Net rates of migration for boroughs with the rest of GB Source: 2001 Census SMS level 1

  7. Developments from 1991 • Coverage of whole UK (for most interaction data) • 100% data for all interaction data including SWS • Data on journey to place of study in Scotland (STS) • Student migration to, at and from university • Richer data: more tables and detail within tables • Additional sets of tables at ‘output area’ level • Imputation of missing data on workplace and migrants’ origins (if not stated and not ‘no usual address 1 yr ago’ • New concept of ‘moving groups’ in SMS • Different approach to disclosure control

  8. In comparison with 1991 Census, there are a similar number of tables but: (1) considerably more counts in 2001, (2) all the counts are 100% in 2001, (3) OA level * 10% sample

  9. Geographical units used in 2001 SMS/SWS/STS

  10. Adjustment for disclosure control in 2001 • Various methods used by ONS in 2001 • minimum thresholds of people and households before the release of data • record swapping between areas • small cell adjustment method (SCAM) • SCAM assumed to adjust values of 1 and 2 to values of 0 and 3 • Significant impact on flows, especially at OA level

  11. How many UK internal migrants? Seven different counts of total migration in 2001 SMS for 2000-01 period: Level from which total derived Table Level 1 Level 2 Level 3 Table 1 (Total): 6,202,016 6,267,740 6,164,996 Table 2 (Family status): 6,204,876 na na Table 3 (Ethnicity): 6,206,216 6,190,926 na Table 4 (LTL illness): 6,205,128 na na Source: 2001 Census SMS tables

  12. CIDS interaction data holdings

  13. 2 WICID CIDS homepage: http://cids.census.ac.uk/

  14. WICID home page

  15. WICID general query interface See paper in Environment and Planning A (2003) for further details

  16. Selection of origins or destinationsWhen choosing origins or destinations, users are confronted with a set of alternative selection tools

  17. Map selection window in WICID WICID uses Post GIS extended PostgresSQL database and MapServer library components

  18. Example of a query: to select flows to City of London from districts in SE and other regions

  19. Analytical Tools Some basic statistics Suite of indicators Some of which require additional data: e.g. distances populations at risk Assembly of PARs is currently underway for 2001 data sets: needs specially commissioned counts for some variables

  20. Migration effectiveness by ethnic group for regions, 2000-01

  21. Connectivity of London boroughs by ethnic group Out-migration In-commuting Source: 2001 Census SMS and SWS level 1

  22. 3 From CIDS to CIDER (Centre for Interaction Data Estimation and Research • CIDS useage statistics

  23. Objectives of CIDER • To continue delivery of a high quality service • To redesign WICID database structure and develop user interface • To gather/estimate further UK census-based data sets (e.g. commissioned tables, SOA-SOA flows) • To expand WICID to include UK non-census data sets (e.g. from NHSCR, patient registers, HESA) • To provide training, to upgrade documentation and to disseminate • To advise on 2011 Census and prepare for inclusion of interaction data sets in WICID

  24. AcknowledgementCIDS is funded by the ESRC/JISC under Census Programme Research Grant H507255177CIDER is funded by the ESRC under Census Programme Research GrantRES-348-25-0005

  25. 4 UPTAP: Overview

  26. Primary aims of UPTAP • To build capacity in secondary data analysis • To promote the use of large-scale social science data sets, both qualitative and quantitative • To improve our understanding of demographic trends and processes which affect society and the population

  27. Principal objectives of UPTAP • To build capacity in secondary data analysis amongst new and mid-career researchers • To spread knowledge and use of secondary analysis through and beyond the social science community • To add value to the ESRC investments in the collection, preservation and promotion of large-scale national data sets by encouraging their use and exploitation • in the longer term, tomaximize the knowledge gained about economic and social change from secondary data analysis

  28. Other ESRC initiatives • ESRC National centre for Research Methods (NCRM) • ESRC Research Methods Programme • ESRC Researcher Development Initiative • ESRC Census Programme • ESRC National Centre for e-Social Science (NCeSS)

  29. Initial UPTAP awards • 4 Postdoctoral Fellowships • 7 Mid-career Research Fellowships (including 1 User Fellowship) • 7 Small Research Grants • 3 larger capacity building projects (with linked studentships) • In total, 21 projects involving 31 researchers

  30. THEMES • Demographic change - Residential change • Fertility - Motherhood - Childlessness • Living arrangements - Childcare • Cohabitation - Mobility • Health - Wellbeing - Employment • Education • Identity - Ethnicity - Segregation • Social and political values

  31. Those projects underway in 2005 • 1 October 2005 Saffron Karlsen and James Nazroo: Being a Muslim in Europe: attitudes and experiences Yaojun Li and Anthony Heath: Socio-economic position and political support of the BMEs in Britain 1971-2004 Paul Norman: The micro-geography of demographic change 1991-2001 • 1 November 2005 Roona Simpson: Delayed childbearing and childlessness in Britain : the 1958 and 1970 cohorts compared Eric Kaufman: A dying creed? The demographic contradictions of liberal capitalism

  32. Those projects commencing on 1 Jan 2006 • Ernestina Coast: Currently cohabiting: relationship attitudes, intentions and behaviour • Shu-Li Cheng: The impact of educational qualifications on trends in leisure activities • Dan Vickers: The changing residential patterns of the UK 1991-2001 • Dimitris Ballas: Exploring geographies of happiness and well-being in Britain • Daniel Guinea-Martin: Trends in gender and ethnic occupational segregation in England and Wales: longitudinal evidence • Kirstine Hansen, Heather Joshi and Denise Hawkes: Motherhood and child outcomes: the consequences of the timing of motherhood and mothers' employment on child outcomes • Sarah Smith, Anita Ratcliffe and Mike Brewer: Understanding the effect of public policy on fertility; secondary data analysis • Harriet Young and Emily Grundy: Living arrangements, health and well-being: a European perspective

  33. Those projects commencing in last 6 months • 1 February 2006 Paula Surridge: The making of social values: social attitudes and social change • 1 March 2006 Patrick Sturgis and Nick Allum: Social and political trust: a longitudinal and comparative perspective • 1 June 2006 Paul Boyle, Vernon Gayle, Elspeth Graham and Ali Zohoor: Does stepparenting influence mental health?

  34. Those projects yet to commence • 1 August 2006 Alison Smith: Intergenerational contributions to childcare across Europe Oliver Duke-Williams: Links between internal migration, commuting and inter-household relationships • 1 October 2006 Michelle Jackson: Investigating inequalities in educational attainment Gopalakrishnan Netuveli: Treating longitudinal data as longitudinal: comparing models to describe employment status and health trajectories in British Household Panel Survey • 1 May 2007 Claudia Thomas: How does employment affect cardiovascular risk? A life-course approach in the 1958 cohort

  35. UPTAP web site: www.uptap.net

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