Hmm, I’m skeptical of this model.  It seems like it would be increasingly difficult to achieve a constant 1.1x multiplier as you add more people.

For example, it would be much harder for Apple's 300th employee to increase their share price by 10% compared to their 5th employee.

I think overconfident and underconfident aren't crisp terms to describe this.  With binary outcomes, you can invert the prediction and it means the same thing (20% chance of X == 80% chance of not X).  So being below the calibration line in the 90% bucket and above the line in the 10% bucket are functionally the same thing.

I’m not affiliated with Canopy Retreats but I agree that’d be useful

EA Retreats recently rebranded as Canopy Retreats (canopyretreats.org).

The new effectivealtruism.org homepage looks fantastic.

Timeline Swapping

Alice, a highly experienced ML researcher, thinks crunch time for AI will come in 20-30 years.  She spends quite a bit of her time community-building for AI safety, i.e. maximizing her impact if crunch time is in 20-30 years rather than if it is now.

Bob, a newer researcher with less skills, thinks we’re in crunch time now.  He might try to take a role at a current AI org that maximizes his current impact but isn’t spectacular for developing career capital.

It seems like if Alice and Bob could coordinate properly, Alice would operate under Bob’s timelines, Bob under Alice’s, and both would be better off.

Has anyone written more about this idea?

It appears that the tax situation in the U.S. is extremely disadvantageous for sports betting.  Total winnings (not net) are taxed as income and losses can only be deducted if you itemize.

For example, if you win $800 and then lose $1000, you are stuck paying taxes on $800, even though you have no net profit (if you don't itemize your deduction).  The tax rate for gambling winnings appears to be 24%, though I'm not sure if this is correct.  So for people who are trying the approach "bet $1000 on something very unlikely... if you lose, bet the $1000 of site credit on something extremely likely", keep in mind that the modal outcome using this strategy is a loss of ~$240 when you consider taxes.  

I agree with that analysis (and someone risk-neutral should bet the 2nd game on whatever game has the lowest vig).

Worth considering taxes, though.

The BetMGM one has the same $1000 promotion as Fanduel (actually worse, since you receive five free bets at 20% of your initial bet amount rather than a single one).  Can you update your post to reflect this?

The Fanduel one isn't actually risk free (though still +EV).  The promotion is that if you lose your first bet up to $1000, they give you your wager amount back in site credit, which can't be directly withdrawn (and if you win you just get your bet winnings).