Reading Comprehension

PT157 · S4 · P2 · Q14 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.

14.

The relation between the conception in passage A and the conception in passage B, respectively, of how markets handle the knowledge of their participants, is most analogous to the relation between

  1. a typewriter and a word

    Wrong Emphasis

    The typewriter is the clunkier, slower device, but Passage A is the one that thinks that markets are fast and badass. Even if the two nouns were reversed, it's not great because the relationship wasn't "they both think that markets produce the same output, but one of them thinks the output is cleaner and faster than the other".

    10% picked this

  2. Correct

    a thermostat and a thermometer

    Why this is right

    This is a stretch of our poetic imagination, but a thermostat "predicts the future" in some way. You set it to 75º, and it reads 75º until reality finally catches up to meet it at that temperature. If we think about the quickly disseminating knowledge view of Passage A, we could think, "When we tell the thermostat our insider knowledge --- psst, make the house 75 degrees, then the thermostat reacts and brings the house's climate closer to that standard." Meanwhile, a thermometer just tells you what the temperature actually is, not what it should be or will be. That matches Passage B's notion of a moment by moment snapshot of opinion.

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

    51% picked this

  3. a bicycle and a motorcycle

    Wrong Emphasis

    The bike is the clunkier, slower device, but Passage A is the one that thinks that markets are fast and badass. Even if the two nouns were reversed, it's not great because the relationship wasn't "they both think that markets do the same thing, but one of them thinks that markets do that thing faster than the other."

    2% picked this

  4. a news broadcast and a

    Wrong Emphasis

    This might be appealing if we thought of "magazine" as a proxy for "opinion" and thought of news broadcast as a proxy for "actual information". Passage A thinks that markets deliver real information, whereas Passage B thinks that markets just tell you an aggregation of fallible opinion. But a news broadcast can report on moment by moment public opinion. And a magazine can be factual and informative (such as National Geographic). So these two nouns don't have a stable enough relationship to a distinction between "the legit truth" and "momentary public opinion".

    26% picked this

  5. a digital camera and a

    Wrong Emphasis

    This is better than (A) and (C) because now we have the sexier, more impressive half of the pair assigned to Passage A, whereas those other two had the more sophisticated noun assigned to Passage B. But digital cameras and film cameras both take pictures. The difference in film doesn't change their overall function. Meanwhile, Passage A and B had differing thoughts on what the overall functions of markets are. Passage A thought they were a way of providing collective wisdom, rewarding people for being correct in their judgments. Passage A even thought that markets could be used to provide forecasts, whereas Passage B says that markets do not predict the future. Because this pair of nouns has the same function, it's a weaker match than the correct answer, in which the two nouns have different functions.

    11% picked this

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