Metaculus Help: Spread the word

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What are the most useful tools/data sources in making predictions?

We're creating a collection of useful tools and data sources, and would love to hear from you what you find helpful. These might include:

  • Commonly used datasets for question creation or answering.

  • Helpful online tools for statistics, probabilities, regressions, etc.

  • Resources for good prediction techniques, debiasing, etc.

And so on. (If you make your suggestions in individual comments we can smiley-vote them as well.)