Reading Comprehension

PT157 · S4 · P2 · Q11 Wisdom of Markets

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Passage AMarkets, such as stock exchanges, distill the collective wisdom of millions of individuals into a single number, and they do so with amazing efficiency.

Topic

The accuracy and limitations of markets—especially prediction markets—when it comes to gathering and reflecting information.

Framework

Present Debate

Main Point

While markets (including prediction markets) can efficiently aggregate information and often make accurate forecasts, they are not infallible and ultimately reflect the prevailing opinion at a given time rather than any guaranteed insight into the future. **Most Valuable Sentences:** - Passage A: - Passage B:

P1 (Passage A): Markets as Efficient Information Gatherers

Markets (unlike committees or polls) efficiently turn the opinions and knowledge of many individuals into useful predictions or prices, rewarding those who have correct insights.

P2 (Passage A): Example—Prediction Markets

Describes the structure and success of engineered markets like the Iowa Electronic Markets, which use actual money to encourage accurate predictions—sometimes even outperforming polls.

P3 (Passage A): How Markets Rapidly Learn

Explains, via an experiment, how markets can quickly reflect the knowledge of even a small number of informed participants, making everyone act as though they are "in the know" by watching price movements.

11.

The relationship between which one of the following pairs of essays, based on what can be inferred from their titles, is most analogous to the relationship between passage A and passage B, respectively?

  1. "The Future of Computing" and

    Wrong Emphasis

    The 2nd name here seems like a decent match for Passage B, because B would say that markets have a very flawed track record of being right. But how would the 1st name match Passage A? It wasn't about the future of markets. There's also a problem with this pair of titles in the sense that they're not focused on the same topic, whereas Passage A and B were both focused on the same topic: markets. The first title here sounds like an article about computing, while the second title sounds like an article about people who try to predict the future.

    9% picked this

  2. "Computer Models for Predicting Elections"

    Wrong Emphasis

    There isn't any positive quality to the 1st title or negative quality to the 2nd title. To their credit, these titles are both on the same topic, but if we substituted computers for markets, there's not a lot to love: A: Markets that Predict Elections B: Margins of Error in Markets that Predict Elections Since Passage B is saying that markets are vulnerable to errors, the 2nd title here is somewhat tempting. The title itself does not convey any negative assessment, though. Similarly, the title for A doesn't convey a positive or negative assessment. The double-neutrality of these titles make them a less clear match than we get in the correct answer.

    22% picked this

  3. "The Pace of Computer Innovation"

    Wrong Emphasis

    Both of these are future-looking, whereas the passages about the markets were not. The second passage does seem to have some negativity / skepticism that we could match up with Passage B, but it's not clear that Passage A has any optimism / positivity from its title.

    2% picked this

  4. "Computer Simulations of Stock Prices"

    Wrong Emphasis

    The first title is pretty neutral, whereas we're hoping for one that conveys positivity / optimism. The second title sounds computers are beating humans, and since computers are the proxy for markets, the 2nd title sounds like an article that hypes up how good computer (i.e. markets) are. That's the opposite of what we want the second title to do.

    1% picked this

  5. Correct

    "Computers as Thinking Machines" and

    Why this is right

    If we replace the word computer with markets, these seem pretty good: Passage A: Markets are thinking machines Passage B: Markets don't think Passage A was attesting to the wisdom and 'expertise' of markets, whereas Passage B was pointing to them as nothing more than flawed reflections of flawed opinions.

    Skill tested: Analogy · how this choice captures the passage's function is the move to repeat next time.

    65% picked this

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