geog3025 multivariate neighbourhood indicators. geog3025 multivariate neighbourhood indicators...
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GEOG3025
Multivariate neighbourhood indicators
GEOG3025
Multivariate neighbourhood indicators
• Lecture overview:Objectives of lecture
Introductory questions
Multivariate deprivation
Deprivation indicators
Calculation of indicators
Lecture summary
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Objectives• Understand the concept of multiple
material deprivation• Understand the principle of
multivariate deprivation indicators• Be able to calculate and interpret
general-purpose indicators
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Introductory questions…
What makes an area “deprived”?
How might you measure social deprivation?
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Multiple deprivation
• Recognition that deprivation is a multifaceted phenomenon (Black Report, 1980)
• Particular focus on health care applications
• Measurement requires combination of multiple variables – multivariate indicators
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Research areas
• Material deprivation as cause of health inequality
• Deprivation and mortality• Deprivation and educational
achievement• Use in resourcing public services
(e.g. standard spending assessment)
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Deprivaton or exclusion?
• Multiple deprivation– Derived directly from census data– Derived from census and administrative
data
• Social exclusion– Incorporating concepts of exclusion from
normal activities of citizens e.g. consumption, savings, production, political social (Burchardt et al. 2002)
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Multivariate deprivation…
Remoteness, elderly population?
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Poor transportation, unemployment, lone parents?
Overcrowding, unskilled jobs?
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Census-based deprivation indicators
• Jarman– Deprviation payments to GPs 1980s, 90s
• Carstairs– Health-related, esp. Scotland
• Townsend– Health-based, widely used
• Department of the Environment
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Census deprivation index construction: issues
• Data source choice• Variable choice• To combine or not?• To standardise or not?• To transform or not?• To weight or not?
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Two distributions…
Number of areas
Percentage
Not owner occupied
Unemployed
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Transform and/or standardise?
Standardise:adjust for spread
Transform: adjust for shape
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Example: Townsend score
• Input variables– No car– More than one person per room– Not owner occupied– Unemployed
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Townsend calculation
• Express variables as percentages• Log transformation of
unemployment and overcrowding values (+ 1)
• Z score standardisation of all variables
• Sum the standardised scores with equal weighting
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Townsend score for single area
Variable Percent Log Z
No car
Overcr.
Not own
Unemp.
Score
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Townsend score for single area
Variable Percent Log Score
No car 17
Overcr. 6
Not own 45
Unemp. 9
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Townsend score for single area
Variable Percent Log Z
No car 17 -
Overcr. 6 0.84
Not own 45 -
Unemp. 9 1
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Townsend score for single area
Variable Percent Log Z
No car 17 - 0.9
Overcr. 6 0.84 1.5
Not own 45 - 2.3
Unemp. 9 1 1.1
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Townsend score for single area
Variable Percent Log Z
No car 17 - 0.9
Overcr. 6 0.84 1.5
Not own 45 - 2.3
Unemp. 9 1 1.1
Score 5.8
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Deprivation mapping
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Non-census/hybrid indicators• Index of local conditions• Welsh Jarman• Index of local deprivation• Index of multiple deprivation• Combining census and non-census
variables:– House condition, income support, derelict
land, low GCSE grades, house insurance weights, etc.
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IMD 2000• Index of multiple
deprivation• 6 ‘domains’:
– Income– Employment– Health and disablity– Education, skills and training– Housing– Geographical access to
services
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MAUP/ecological fallacy
• Levels of measured deprivation dependent on area boundaries
• Large areas can conceal small areas (‘pockets’ of deprivation)
• Area-level deprivation indicators will misrepresent many individuals and households within the areas
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Structural problems…
• Different regions have different deprivation structures
• Claims of London-bias may just represent population figures
• Urban-rural deprivation differences• Welsh Jarman – additional
variables
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Assignment• Select variable set and study region• CASWEB retrieval (including
denominators)• Run Geodep spreadsheet• Import dataset• Define denominators• Design indicator• Run/re-run• Interpret scores
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Lecture summary
• Problems with specification and design• Data limitations – especially early
versions• Particularly relevant to general-
purpose indicators• Best to use purpose-specific indicators• Key review reference: Senior (2002) in
Census Data System