1001 PredictionBook Nights

gwern

I explain what I've learned from creating and judging thousands of predictions on personal and real-world matters: the challenges of maintenance, the limitations of prediction markets, the interesting applications to my other essays, skepticism about pundits and unreflective persons' opinions, my own biases like optimism & planning fallacy, 3 very useful heuristics/approaches, and the costs of these activities in general.

Plus an extremely geeky parody of Fate/Stay Night.

This essay exists as a large section of my page on predictions markets on gwern.net: http://www.gwern.net/Prediction%20markets#1001-predictionbook-nights

I explain what I've learned from creating and judging thousands of predictions on personal and real-world matters: the challenges of maintenance, the limitations of prediction markets, the interesting applications to my other essays, skepticism about pundits and unreflective persons' opinions, my own biases like optimism & planning fallacy, 3 very useful heuristics/approaches, and the costs of these activities in general.

Plus an extremely geeky parody of Fate/Stay Night.

This essay exists as a large section of my page on predictions markets on gwern.net: http://www.gwern.net/Prediction%20markets#1001-predictionbook-nights

You don't have very many predictions judged, so I'm not sure how reliable your worry is - only 8-11 predictions for each decile seems quite possible to just get lucky. Assuming that's not the case, you could try mechanically bumping up every prediction by 10% and see what happens.

Also I notice there are many sets of predictions of the the form X will happen in 1 month/2 months/1 year/... with a separate prediction for each time period. How are these scored? Since these types of predictions are highly correlated scoring them individually can cause people to appear over or under confident.

0JoshuaZ15y

Yes, that seems like a good point. I'm especially worried that my long-term predictions will turn out to be much too overconfident. And presumably I won't see that until at least a while has gone by.

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