BPC/MRS enquiry into election: Ipsos MORI response and perspective
Roger Mortimore
King's College London/Ipsos MORI
Paul Baines
Cranfield University
Robert Worcester
King's College London/Ipsos MORI
Mark Gill
GovNet Communications/King's College London
What went wrong?
The accuracy of the forecasts drawn based upon pre-election opinion polls generally, including those by Ipsos MORI, was disappointing at the 2015 general election. As all the polls showed very similar errors, it seemed likely that all were affected by the same factors, and an industry-wide enquiry (chaired by Patrick Sturgis, sponsored by the Market Research Society and the British Polling Council) was set up...