The information requested falls within the responsibility of the UK Statistics Authority. I have asked the Authority to reply.
Letter from Stephen Penneck, dated June 2012
As Director General for the Office for National Statistics, I have been asked to reply to your Parliamentary Question asking what the net change in the number of private sector jobs was in (a) Birmingham, Ladywood constituency and (b) the Birmingham City Council area in the latest period for which figures are available. (114454)
The official estimates of public and private sector jobs are compiled from Work Force Jobs (WFJ) series. However, WFJ do not produce private/public sector job statistics at a geography lower than regional level, so private sector employment has been provided from the Annual Population Survey (APS).
Individuals in the APS are classified to the public or private sector according to their responses to the survey.
Table 1 attached shows the net change in private sector employment from the APS in Birmingham and Birmingham, Ladywood constituency, between the 12 month period ending in March 2012 (the latest available period) and the period one year earlier.
As with any sample survey, estimates from the APS are subject to a margin of uncertainty.
National and local area estimates for many labour market statistics, including employment, unemployment and claimant count are available on the NOMIS website at
|Table 1: Net change in private sector employment between the 12 month period ending March 2011 and March 2012|
|Private sector employment||Net change|
|12 months ending:|
|March 2011||March 2012|
|Note: 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. 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% we would expect the population total to be within the range 180-220 Coefficient of Variation Key (CV) (%) Statistical Robustness * 0 ≤ CV < 5 Estimates are considered precise ** 5 ≤ CV < 10 Estimates are considered reasonably precise *** 10 ≤ CV < 20Estimates are considered acceptable **** CV ≥ 20 Estimates are considered too unreliable for practical purposes Source: Annual Population Survey|