RAJAR

Ipsos MORI is responsible for conducting the joint radio audience measurement research, RAJAR, on behalf of the BBC and commercial radio stations. This is Europe's largest and most complex media survey. We also provide a special analysis service to aid broadcasters and agencies with the interpretation and application of RAJAR results.

RAJAR is the Radio Joint Audience Research body and was set up in 1992 by the BBC and the RadioCentre, the industry body representing the commercial radio stations.

The RAJAR survey has three main objectives:

• to measure radio audiences across approximately 350 individual radio stations in terms of who listens, where, when and how
• to be the industry-wide currency for planning, buying and selling advertising on commercial radio
• to enable radio owners to monitor the performance of radio programmes.

We have run the RAJAR survey since its inception in 1992 and retained the contract for a further two years from January 2007. We are responsible for undertaking the fieldwork, scanning, processing and reporting.

The survey universe is defined as all individuals aged four and over, living in private households in the UK. Participants are asked to complete a listening diary for one week, detailing for each quarter of an hour which station they listened to, where, and on which platform. Platforms include traditional analogue radio (AM / FM), and digital platforms (digital TV, DAB radio, internet).

Diaries are placed throughout 50 weeks of the year and the sampling is devised so that each station's sample is representative of the area it covers. The overall adult sample is approximately 130,000 per year with results published on a quarterly basis.