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eigenrobot's profile
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eigenrobot

@eigenrobot

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eigenrobot.substack.com
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    eigenrobot‏ @eigenrobot 15 Jul 2020

    "sports tournaments make senses" say sports economists. No, idiots coherent ranking requires transitivity s.t. if A beats B and B beats C A must beat C. But single elimination tournaments do not let us observe A vs C so we can never learn whether the premise that ranks have mea

    11:58 PM - 15 Jul 2020
    • 6 Retweets
    • 93 Likes
    • ZowLambda prendal Ben Goodman David Barr Joshua Goins Fake Mario miniBill (Leonardo) tantum Nathan
    19 replies 6 retweets 93 likes
      1. eigenrobot‏ @eigenrobot 16 Jul 2020

        tournament brackets are bullshit you are all being lied to

        6 replies 0 retweets 53 likes
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      1. Covfefe Anon‏ @CovfefeAnon 16 Jul 2020
        Replying to @eigenrobot

        Some tournaments are run round robin - World Cup group stages for example.

        0 replies 0 retweets 2 likes
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      1. レザロックス‏ @rezzealaux 16 Jul 2020
        Replying to @eigenrobot

        Most rankings with transitivity are meaningless, even if they are actually transitive.

        0 replies 0 retweets 1 like
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      1. Berarom‏ @rerarom 16 Jul 2020
        Replying to @eigenrobot

        Athletics doesn't have the problem

        0 replies 0 retweets 2 likes
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      2. eigenrobot‏ @eigenrobot 16 Jul 2020
        Replying to @ProfitProfound

        we used to rule this country economists did

        1 reply 0 retweets 1 like
      3. End of conversation
      1. New conversation
      2. ripquip‏ @ripquip 16 Jul 2020
        Replying to @eigenrobot

        What you want is a Swiss system tournament. It more perfectly assesses relative strengths of competitors, but it lacks the drama of single elimination. And it would be unbelievably expensive to stage one for large team sports.

        1 reply 0 retweets 3 likes
      3. Stochastic Epicurean‏ @StochasticEpic 16 Jul 2020
        Replying to @ripquip @eigenrobot

        And it plays havoc with scheduling since you have to be constantly reworking matchups. Not even noticeable with everyone in the same room, but a nightmare when you have to move a whole caravan of players and support staff around while sorting out tv contracts.

        0 replies 0 retweets 3 likes
      4. End of conversation
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      2. Wiskerz‏ @wiskerz 16 Jul 2020
        Replying to @eigenrobot

        transitivity translate to actual conditional probability -> A beats B, 60% of the time, B beats C, 53% of the time, A beats C (??) sometimes not clear. Single elimination is low sample size, a tradeoff for time However, aggregating over multiple single e tourneys -> reliable

        1 reply 0 retweets 2 likes
      3. eigenrobot‏ @eigenrobot 16 Jul 2020
        Replying to @wiskerz

        Oh no if it's stochastic the ranking will never be known except within tolerances

        1 reply 0 retweets 2 likes
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