Author Archives: Stephen Ruffian

Obviously we’re all a little wary of using the polls since the General Election, but it should be remembered that while the polls then underestimated the Tories and over-estimated Labour, they got our tiny percentage pretty much spot on. The only problem was that, because the Tory vote was higher in actuality than predicted, that we ended up losing a few more Tory/LD marginals than we’d ever expected to.

But Pollsters have been amending their weighting…and the ‘Shy Tory Voter’ doesn’t really seem to exist anymore. They’re out and proud! So I’ve been having a look at what the polls have been predicting for a General Election  held today.

The Method

My reading of the polls uses averages to fill in the gaps on the days when there aren’t polls, and then to run seven day rolling figures based on both those averages and the polls themselves.

The model I use is modelled heavily on that of Martin Baxter’s Electoral Calculus model, as featured often in the press. The idea is that one takes the ‘base’ vote of each constituency (i.e. Southport 2010 36% Con, 9% Lab, 50% LD etc), place that against the GE figure for that year (i.e. 37 Con, 30 Lab, 24 LD) and then see how the constituency figure moves with regards to latest polling (i.e. the final poll pre 2015 GE of 33 Con, 33 Lab and 9 LD) and then see how the initial constituency figure moves (in this case to 33 Con, 12 Lab and 35 LD) thus showing how John Pugh kept his seat.