#### Key Features of the Pobal HP Deprivation Index

This section provides a brief summary of the 2011 Pobal Haase-Pratschke Deprivation Index for Small Areas (HP Deprivation Index hereafter), drawing on recent data from the 2011 Census of Population. Building on the innovative and powerful approach to the construction of deprivation indices developed in our previous research (Haase and Pratschke, 2004, 2005, 2008, 2010, 2011), the 2011 Pobal HP Deprivation Index provides an up-to-date analysis of the changes in deprivation that have occurred in each local area over the past five years1.

The HP Deprivation Index presented in this report is based on Small Areas (SA), the new census geography developed jointly by the Ordnance Survey of Ireland (OSI) and the Central Statistics Office (CSO) for the publication of the Small Area Population Statistics (SAPS) from the 2011 Census of Population.

Until recently, the smallest spatial units for which consistent SAPS data were available were the Electoral Divisions (EDs). However, EDs do not provide a homogeneous coverage of the spatial distribution of the Irish population, as they range from as low as 76 individuals in some rural areas to over 32,000 in Blanchardstown- Blakestown. This unevenness in population generates considerable difficulties when mapping social and economic data. The new SAs for Ireland follow analogous revisions to the census geography in the UK and Northern Ireland and are much more homogeneous, with a minimum of 50 households and a mean of just under 100 households.

Please note that the new HP Deprivation Index replaces all previously published data, as all data are computed in a consistent manner for the 2006 and 2011 census waves. Also note that index scores that are constructed from the SA level analysis cannot be compared with those derived from an ED level analysis.

#### 9 How is the 2011 Pobal HP Deprivation Index constructed?

Most deprivation indices are based on a factor analytical approach which reduces a larger number of indicator variables to a smaller number of underlying dimensions or factors. This approach is taken a step further in the Pobal HP Deprivation Index developed by Haase and Pratschke: rather than allowing the definition of the underlying dimensions of deprivation to be determined by data-driven techniques, the authors develop a prior conceptualisation of these dimensions. Based on earlier deprivation indices for Ireland, as well as analyses from other countries, three dimensions of affluence/disadvantage are identified: Demographic Profile, Social Class Composition and Labour Market Situation.

Demographic Profile Profile is first and foremost a measure of rural affluence/deprivation. Whilst long-term adverse labour market conditions tend to manifest themselves in urban areas in the form of unemployment blackspots, in rural areas, by contrast, the result is typically agricultural underemployment and/or emigration. Emigration from deprived rural areas is also, and increasingly, the result of a mismatch between education and skill levels, on the one hand, and available job opportunities, on the other. Emigration is socially selective, being concentrated amongst core working-age cohorts and those with further education, leaving the communities concerned with a disproportionate concentration of economically-dependent individuals as well as those with lower levels of education. Sustained emigration leads to an erosion of the local labour force, a decreased attractiveness for commercial and industrial investment and, ultimately, a decline in the availability of services.

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