Universe definition
There is a complex matrix of BBS eligibility criteria, including factors such as occupation, establishment size, turnover, responsibility for recruiting staff, having a degree or equivalent educational qualification. Full details of the eligibility criteria are available from Ipsos MediaCT.

Universe size
1,559,000

Sample size
3,567

Methodology
BBS 2008 uses the same face-to-face and paper self completion method as in previous years, but also included a postal boost of C-suite executives working in large companies.

The face-to-face survey is sampled from pre-selected addresses using a multi-stage, disproportional sampling approach. Selected addresses are screened face-to-face to determine the incidence of eligible individuals.

Research company and co-guarantor
Ipsos MediaCT