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Unemployment: Essex

Volume 488: debated on Tuesday 24 February 2009

To ask the Chancellor of the Duchy of Lancaster how many unemployed people there were in (a) Braintree and (b) Essex in (i) 1997 and (ii) the most recent period for which figures are available. (256843)

The information requested falls within the responsibility of the UK Statistics Authority. I have asked the authority to reply.

Letter from Karen Dunnell, dated 23 February 2009:

As National Statistician, I have been asked to reply to your Parliamentary Question asking how many unemployed people there were in (a) Braintree and (b) Essex in (i) 1997 and (ii) the most recent period for which figures are available. (256843)

The Office for National Statistics (ONS) compiles unemployment statistics for local areas from the Annual Population Survey (APS) and its predecessor the annual Labour Force Survey (LFS) following International Labour Organisation (ILO) definitions.

Table 1 shows the number of people aged 16 and over, resident in (a) Braintree parliamentary constituency and (b) Essex who were unemployed in (i) 1997 and (ii) 2008.

Estimates are provided for the 12 months ending in February 1997, from annual LFS, which is the only period covered by the survey in 1997, and for the 12 months ending in June 2008, from APS. The July 2007 to June 2008 APS dataset is the most recent for which figures are available.

As the estimates for Essex are for a subset of the population in small geographical areas, they are based on small sample sizes, and are therefore subject to large margins of uncertainty. Reliable estimates for the Braintree parliamentary constituency are not available.

Table 1: Number of persons unemployed1 resident in Braintree parliamentary constituency and county of Essex

Thousand

12 months ending

Braintree

Essex

February 1997

3__

47

June 20082

****3

***33

1 Levels of unemployment are provided for persons aged 16 and over. The figures presented are weighted to population estimates published in 2007.

2 Coefficients of Variation have been calculated for the latest period as an indication of the quality of the estimates. See Guide to Quality as follows.

3 Figures are disclosive or statistically unreliable.

The Coefficient of Variation (CV) indicates the quality of an estimate, the smaller the CV value the higher the quality. The true value is likely to lie within +/- twice the CV - for example, for an estimate of 200 with a CV of 5 per cent. we would expect the population total to be within the range 180-220

Guide to Quality:

The Coefficient of Variation (CV) indicates the quality of an estimate, the smaller the CV value the higher the quality. The true value is likely to lie within +/- twice the CV - for example, for an estimate of 200 with a CV of 5 per cent. we would expect the population total to be within the range 180-220.

Key Coefficient of Variation (CV) (%) Statistical robustness

* 0 = CV <5 Estimates are considered precise.

** 5 = CV <10 Estimates are considered reasonably precise.

*** 10 = CV <20 Estimates are considered acceptable.

**** CV = 20 Estimates are considered too unreliable for practical purposes.

Note:

Sample size too small to provide estimates for lone fathers.

Source:

Annual Labour Force Survey and Annual Population Survey