Stochastc Democracy explains the difference between House Effects(Bias) and Design Effects(PIE), problems with Nate Silver's Pollster Ratings system, and a new and more accurate way to estimate both in real-time.
One of the key findings is that in election horse-race polls, PIE does not differ significantly among Pollsters, with House effects(Bias) being more pronounced then previously thought.
Estimated Pollster Introduced Error vs Number of Polls in Obama Approval Database
See graphs, House-Effect Tables, and more, below the fold or at StochasticDemocracy.com
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