David Auerbach

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Confirmation Bias

Confirmation Bias

Did big data sink the Clinton campaign?

Why did Ada fail in Michigan? The primary and the general election were different contests, but both suggest that the failure lay in Ada’s model of the electorate—or more precisely, her inability to update her model of the electorate. In the general election, Ada told Clinton that Wisconsin was a lock, that Michigan was not a problem. But it wasn’t so much that Ada’s cake arbitrarily failed to rise; the failure was in the recipe. In an election where a great realignment took place—where thousands of voters in Rust Belt states who had voted for Obama twice now turned to Trump—Ada had not been programmed to detect the possibility of that realignment. The oracle had been hamstrung from the start.