A forecasting digest with a focus on experimental forecasting.

  • You can sign up here.
  • You can also see this post on the Effective Altruism Forum here
  • And the post is archived here

The newsletter itself is experimental, but there will be at least five more iterations. Feel free to use this post as a forecasting open thread.

Conflict of interest: With Foretold in general and Jacob Laguerros in particular. This is marked as (c.o.i) throughout the text.


  • Prediction Markets & Forecasting platforms.
    • Augur.
    • PredictIt & Election Betting Odds.
    • Replication Markets.
    • Coronavirus Information Markets.
    • Foretold. (c.o.i).
    • Metaculus.
    • Good Judgement Inc. & Good Judgement Open.
  • In the News.
  • Long Content.

Prediction Markets & Forecasting platforms.

Forecasters may now choose to forecast any of the four horsemen of the Apocalypse: Death, Famine, Pestilence and War.

Augur: augur.net

Augur is a decentralized prediction market. It will be undergoing its first major update.

Predict It & Election Betting Odds: predictIt.org & electionBettingOdds.com

PredictIt is a prediction platform restricted to US citizens or those who bother using a VPN. Anecdotically, it often has free energy, that is, places where one can earn money by having better probabilities, and where this is not too hard. However, due to fees & the hassle of setting it up, these inefficiencies don't get corrected. In PredictIt, the world politics section...

The question on which Asian/Pacific leaders will leave office next? also looks like it has a lot of free energy, as it overestimates low probability events.

Election Betting Odds aggregates PredictIt with other such services for the US presidential elections.

Replication Markets: replicationmarkets.com

Replication Markets is a project where volunteer forecasters try to predict whether a given study's results will be replicated with high power. Rewards are monetary, but only given out to the top N forecasters, and markets suffer from sometimes being dull. They have added two market-maker bots and commenced and conclude their 6th round. They also added a sleek new widget to visualize the price of shares better.

Coronavirus Information Markets: coronainformationmarkets.com

For those who want to put their money where their mouth is, there is now a prediction market for coronavirus related information. The number of questions is small, and the current trading volume started at $8000, but may increase. Another similar platform is waves.exchange/prediction, which seems to be just a wallet to which a prediction market has been grafted on.

Unfortunately, I couldn't make a transaction in these markets with ~30 mins; the time needed to be included in an ethereum block is longer and I may have been too stingy with my gas fee.

Foretold: foretold.io (c.o.i)

Foretold is an forecasting platform which has experimentation and exploration of forecasting methods in mind. They bring us:

Metaculus: metaculus.com

Metaculus is a forecasting platform with an active community and lots of interesting questions. They bring us a series of tournaments and question series:

Good Judgement Inc. & Good Judgement Open.

Good Judgement Inc. is the organization which grew out of Tetlock's research on forecasting, and out of the Good Judgement Project, which won the IARPA ACE forecasting competition, and resulted in the research covered in the Superforecasting book.

The Open Philantropy Project has funded this covid dashboard by their (Good Judgement Inc.'s) Superforecasting Analytics Service, with predictions solely from superforecasters; see more on this blogpost.

Good Judgement Inc. also organizes the Good Judgement Open (gjopen.com)[https://www.gjopen.com/], a forecasting platform open to all, with a focus on serious geopolitical questions. They structure their questions in challenges, to which they have recently added one on the Coronavirus Outbreak; some of these questions are similar in spirit to the short-fuse Metaculus Tournament.

Of the questions which have been added recently to the Good Judgment Open, the crowd doesn't buy that Tesla will release an autopilot feature to navigate traffic lights, despite announcements to the contrary. Further, the aggregate...

  • is extremely confident that, before 1 January 2021, the Russian constitution will be amended to allow Vladimir Putin to remain president after his current term.
  • gives a lagging estimate of 50% on Benjamin Netanyahu ceasing to be the prime minister of Israel before 1 January 2021.
  • and 10% for Nicolás Maduro leaving before the 1st of June.
  • forecasts famine (70%).
  • Of particular interest is that GJOpen didn't see the upsurge in tests (and thus positives) in the US until until the day before they happened, for this question. Forecasters, including superforecasters, went with a linear extrapolation from the previous n (usually 7) days. However, even though the number of cases looks locally linear, it's also globally exponential, as this 3Blue1Brown video shows. On the other hand, an enterprising forecaster tried to fit a Gompertz distribution, but then fared pretty badly.

In the News

Long Content

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3 comments, sorted by Click to highlight new comments since: Today at 4:45 PM

Seem interesting, and i want to follow, but the only way i will do that it if there will be RSS feed.

Can you add RSS feed to the archive? i think it should be simple.

I'll let you know. 30%-ish.