the human development indices oxford, sep 14 2004 claes johansson united nations development...
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The Human Development Indices
Oxford, Sep 14 2004Claes Johansson
United Nations Development ProgrammeHuman Development Report Office
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The Human Development Indices• The HDI (Human Development Index)
- a summary measure of human development
• The GDI (Gender-related Development Index) - the HDI adjusted for gender inequality
• The GEM (Gender Empowerment Measure) - Measures gender equality in economic and political participation and decision making
• The HPI (Human Poverty Index) - Captures the level of human poverty
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The dimensions and indicators of the HDI
• HDI has three dimensions, measured by one or two indicators each:
• Leading a long and healthy life– Life expectancy at birth
• Education– Adult literacy rate– Gross primary, secondary and tertiary
enrolment
• A decent standard of living– GDP per capita (PPP US$)
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What dimensions to include
• The concept of human development has many dimensions
• Health, education and standard of living are dimensions that are basic and can be measured
• Proposed additions either are hard to measure or overlap with existing dimensions - Examples: political freedom, environment, child mortality
• HD can never be captured in single indicator!
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Combining indicators for the HDI
• In order to create the HDI, ‘goalposts’ are chosen for each indicator
• Using goalposts rather than observed minima and maxima allows comparisons over time
• Set with the timeframe 1960-2050
• Also set to allow for disaggregation – some subgroups can have lower values than observed in country data
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Goalposts for calculating the HDI
Indicator Minimum value Maximum value
Life expectancy 25 years 85 years
Adult literacy 0% 100%
Gross enrolment 0% 100%
GDP per capita 100 (PPP US$) 40,000 (PPP US$)
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Calculating the HDI
Dimensions:
Indicators:
Dimensionindex
A long and
healthy life
Life
Expectancy
Life
Expectancy
Index
Being
Knowledgeable
Literacy &
Enrolment
Education
Index
A decent
standard
of living
GDP
per capita
GDP
Index
The HDI
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25 years
85 years
0
1
41.4
Life expectancy
index
0.27
100%
0%
78.1 0.68
Literacy (2/3)
Enrolment (1/3)
49
0% 0
100% 1
Education indexIncome index
40,000
100
0.34780
0
1
(log scale)
HDI
1
0
0.433
0.27 + 0.68 + 0.34 3
= 0.433
Calculating the HDI: an example (Zambia)
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The weights in the HDI
• The three dimensions in the HDI – health, education, standard of living – weighted equally
• Equal weighting is not an accident; reflects a belief that all three are equally important
• Assumption of substitutability – central, but sometimes forgotten
• Changing the weighting, even drastically, maintain
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Changing weights – what would happen?
• How sensitive is the HDI to changing weights?• Not very: for the full set of countries, the
components are highly correlated• Does not implicate redundancy: in sub-groups,
large differences in how income is translated into other dimensions
Life expectancy
Education GDP
Life expectancy
- 0.74 0.78
Education - 0.75
GDP -
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Average absolute rank change with changing weights
1 2 3 4 5 6 7 89 10
Life expectancyGDP
Education
0
2
4
6
8
10
12
14A
ve
rag
e a
bs
olu
te r
an
k c
ha
ng
e
Higher weight
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Correlation with the HDI with increasing weights by subcomponent
1 2 3 4 5 6 7 8 910
Life expectancyGDP
Education
0.910.920.930.94
0.950.96
0.97
0.98
0.99
1C
orr
ela
tio
n w
ith
HD
I
Weight awarded
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Why include GDP per capita?
• GDP per capita included as a proxy for a decent standard of living
• Reflects a number of issues not explicitly included: the expanding choices available in many areas with increasing income
• Logarithm of GDP is used – reflects diminishing return in expanding choices
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Critiques of the HDI
Critiques
• Are these all the dimensions of HD?• Are these indicators good measures of
the dimensions?• What about inequality?• Can it capture policy changes?• Ranking countries – unknown
uncertainties• Why cap values?• Why have an index at all?
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Critiques, cont.
• What about future generations – an environmental degradation component?
• Political freedoms and rights?
• Culture
• Nutritional status
• Uncertainty
• Personal security
‘Missing’ components
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Critiques incorporated in the HDI
• Absolute maximum and minimum values for each indicator
• Supplementing literacy with a second education indicator
• Changing the adjustment of GDP per capita
Critiques that have been incorporated
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Political freedom
• Political freedom index (PFI) presented in HDR 1991
• Meant to be incorporated in the HDI
• Caused technical and political controversy
• Ultimately dropped because of the difficulties of measurement
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• Literacy– Conceptually and practically limited– Definition and collection of literacy varies
widely from country to country– Culturally specific: script systems and other
factors vary across the world– UNESCO Institute of Statistics LAMP
programme
Key data problems
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• GDP per capita (PPP US$)– Based on the ICP programme, limited to
some 60 countries– Based on regressions for other countries– Imperfect measure but certainly better than
exchange rate terms
• Life expectancy– Should measure “long and healthy life” but
does not take into account health, just length
Key data problems, cont.
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Staying power of the HDI
• HDI has become one of the best known and most used indicators of development.
• Despite some remaining controversies, broadly accepted and used by media, policymakers and academics
• What factors likely contributed?
Why has the HDI been successful?
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Staying power of the HDI
• Underpinned by four aspects:– Conceptual clarity that facilitates its power
as a tool of communication– Reasonable level of aggregation– Use of universal criteria and variables– Use of standardized international data
explicitly designed for comparison
Policy relevance, and acceptability
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• Specification of the HDI derived from a clearly defined concept:– Dimensions and variables correspond to the
concepts of human development– Meaning of variables intuitively
understandable
Conceptual clarity
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Reasonable level of aggregation
• HDI focuses on a set of universally -applicable core issues
• Aggregating too many issues tends to compromise analytical usefulness and policy relevance
• Separate indices for e.g. gender empowerment, human poverty
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• Universally-relevant concepts and variables
• High degree of consensus that more is better in each of the variables
• In contrast with e.g. election frequency, voter turnout, share of largest party
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• Uses data that are legitimized through the international statistical system– Of course, still data problems but data have
been standardized to ensure inter-country comparability
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Appropriate uses of the HDI
• Ordinal vs. cardinal – HDI value has a meaning but it is not intuitive and should be used carefully
• Ranking
• Example: reversals in HDI? Arguably meaningful exercise, if weights are accepted
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Other indices
• Whereas HDI measures average achievement, the HPI measures deprivations
• Separate indices for developing countries (HPI-1) and high-income OECD countries (HPI-2)
The Human Poverty Indices (HPI-1 and HPI-2)
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Other indices
• HDI and GDI focus on national averages (conglomerative aspect)
• HPI focuses on the worst off (deprivational aspect)
The deprivational perspective
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Other indices
• Distinguishing between developing and OECD countries recognized the relative nature of poverty
• Allows the use of richer, more appropriate data
• Different deprivations are more relevant in different contexts
Why separate indices
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Other indices
The Human Poverty Index for developing countries (HPI-1)
Dimensions: Indicators:A long and healthy life
Probability at birth of not surviving until age 40
Knowledge Adult illiteracy rate
A decent standard Access to safe water and
children underweight for age
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Other indices
The Human Poverty Index (HPI-1)
Where:P1=Probability of not surviving to age 40 (times 100)P2=Adult illiteracy rateP3= Average of people without access to safe water and children underweight
As rises greater weight is given to the dimension in which there is most deprivation. =1 implies simple
average (perfect substitutability), =∞ tsets HPI = highest value (no substitutability). In he global HDR =3, giving additional but not overwhelming weight to areas of most acute deprivation
/1321 )](3/1[ PPPHPI
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in the HPI formula
• As rises greater weight is given to the dimension in which there is most deprivation.
=1 implies simple average (perfect substitutability),
=∞ HPI = highest value (no substitutability).
• In the global HDR =3, giving additional but not overwhelming weight to areas of most acute deprivation
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Other indices
The Human Poverty Index for OECD countries (HPI-2)
Dimensions: Indicators:A long and healthy life
Probability at birth of not surviving until age 60
Knowledge Functional illiteracy rate
A decent standard Social exclusion
Relative income poverty Long-term unemployment
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Other indices
The Human Poverty Index (HPI-2)
Where:P1=Probability of not surviving to age 60 (times 100)P2=Functional illiteracy rateP3=Relative income poverty (population below 50% median income)P4 = Long-term unemployment
As rises greater weight is given to the dimension in which there is most deprivation. In the global HDR =3, giving additional but not overwhelming weight to areas of most acute deprivation
/14321 )](4/1[ PPPPHPI
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Other indices
The Gender-related development Index (GDI)
Same components as the HDI
After calculating dimension index for each sex – they are combined in a way to penalize gender equality (equally distributed index)
The GDI is calculated by taking the unweighted average of the three equally distributed indices
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Other indices
The Gender-related development Index (GDI)
Formula for the equally distributed index:
1/11
1
)]}.(..[
)].(..{[
indexmalesharepopmale
indexfemalesharepopFemale
determines the size of gender equality in a society. In the global HDR it is set at 2.
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Goalposts for calculating the GDI
Other indices
Indicator
Life expectancy
Female 27.5 years 87.5 years
Male 22.5 years 82.5 years
Adult literacy 100% 0%
Gross enrolment 100% 0%
GDP per capita $40,000(US) $100(US)
Maximum
Value
Minimum
value
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Other indices
The Gender Empowerment Measure
Dimensions: Indicators:Political participation and decision making
Share of parliamentary seats
Economic participation and decision making
Share of positions as legislators, senior officials and managers; and profesional and technical workers
Power over economic resources
Share of estimated earned income
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Other indices
The Gender Empowerment Measure
Calculate dimension index and equally distributed equivalent percentage (EDEP) for each dimension (like GDI)
For political and economic decision making divide EDEP by 50 (the ideal share women should have)
N.B. For political and economic decision making EDEP can be calculated directly (as indicators are already %)
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Other indices
Income is not logged in the calculation of the income index.
Again = 2, for moderate penalisation of inequality
The Gender Empowerment Measure
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Discrimination through the lens of the HDI
Life
expectancy
Literacy
Income