Reasons for changing the forecasting model: a response to The Economist

The Economist magazine have published a great article on the difficulties of predicting the next election. It makes lots of good points well and kindly covers my 2015 general election forecasting model. But I was bemused by the line that reads, “Within months he had published a revised model: polls had not adhered to the original one.” Continue reading Reasons for changing the forecasting model: a response to The Economist

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How the 2015 general election forecast probabilities have changed thus far and why

The graph below shows how my 2015 general election forecast probabilities have changed since October last year.* The blue line shows the probability that the Conservatives will have the largest number of seats. The corresponding red line for Labour is just the mirror image. Also included in the graph is the probability of a hung parliament. Continue reading How the 2015 general election forecast probabilities have changed thus far and why

A long range forecast for the UKIP share of the vote at the 2015 general election

Previous posts at this blog introduce my long-range general election forecasting model, which is updated on Fridays here.

Thus far I haven’t published a forecast of the UKIP share of vote because the party hasn’t been competing in general elections for long enough to build a proper statistical regression model of the relationship between their support in the polls and their votes at elections, as for the three main parties. Continue reading A long range forecast for the UKIP share of the vote at the 2015 general election

Revised long-range forecasting method for a 2015 British General Election

I have revised my 2015 forecasting methodology. There is a new working paper here. The old one from October 2013 is still here, and there are past blog posts here and here that provide more background. The current forecast is below and will be updated weekly here. Continue reading Revised long-range forecasting method for a 2015 British General Election

Forecasting the 2017 UK General Election