Filtered dossier

Hidden Numbers

Quantities that hide a rule you never agreed to.

  • 12 / 12
  • No visual on file
    Scarcity & Queues Entry #0451

    Why a limited edition raises value without raising quality

    The product is identical. The only thing that changed is the number that will be made, and that number changed the price people are willing to pay.

    Novice
    The hidden part #0451

    Supply constraint is a design decision. The limited edition does not discover rarity; it manufactures it and lets the market treat the result as worth.

    Open file
  • No visual on file
    Statistical Illusions Entry #0432

    Why a correlation of one variable with time explains nothing

    Two quantities that both rise over the years will correlate strongly with each other. The shared trend does the work and neither variable has touched the other.

    Novice
    The hidden part #0432

    Two trends will always agree. The coefficient reports the shared direction of time, not a relationship between the variables.

    Open file
  • No visual on file
    Statistical Illusions Entry #0427

    The reason a rising rate can mean a shrinking problem

    The rate went up and the headline called it a crisis. The count went down and nobody mentioned it. Both statements described the same data.

    Adept
    The hidden part #0427

    Denominators move independently. A rising rate can coexist with a falling count whenever the base grows faster than the outcome.

    Open file
  • No visual on file
    Statistical Illusions Entry #0426

    Why an average can describe nobody in the room

    The average income in a room of ten people can be a number that none of them earn, and yet it is reported as if it describes them all.

    Novice
    The hidden part #0426

    Central tendency erases the spread. The average describes the arithmetic, not the room.

    Open file
  • No visual on file
    Market Signals Entry #0404

    The reason a company that advertises must be solvent

    The advertisement does not persuade because of what it says. It persuades because spending visibly on something that could fail is proof that failure is not expected.

    Adept
    The hidden part #0404

    Spend implies expected future revenue. The advertisement’s most persuasive argument is not what it says but how much it cost.

    Open file
  • No visual on file
    Incentive Design Entry #0383

    The reason relative ranking beats absolute targets

    A fixed target stops motivating the moment it is met. A ranking has no ceiling, and it also has no protection against the loser competing on the wrong dimension.

    Adept
    The hidden part #0383

    A target has a ceiling and a ranking has none. Uncapped competition also has no cap on how it is pursued.

    Open file
  • No visual on file
    Market Signals Entry #0403

    Why a guarantee is a statement about failure rates

    A company that offers a long warranty is not being generous. It is telling you, in financial language, how rarely it expects to pay.

    Novice
    The hidden part #0403

    Confidence is expressed in liability. The warranty says less about what will happen to the buyer and more about what the company already knows will not.

    Open file
  • No visual on file
    Price Psychology Entry #0362

    The reason personalised pricing feels like a penalty

    Two buyers pay different prices for the same item. The one who paid more does not see a market. They see a judgement about how much they were willing to lose.

    Adept
    The hidden part #0362

    Personalised pricing is efficient in aggregate and punitive in particular. The buyer who paid more does not feel optimised. They feel targeted.

    Open file
  • No visual on file
    Incentive Design Entry #0378

    Why a fine can act as a price

    Before the fine existed, guilt kept the behaviour in check. After the fine was introduced, the behaviour increased — because paying made it permissible.

    Novice
    The hidden part #0378

    Priced misbehaviour becomes permitted misbehaviour. The fine did not add a cost; it removed a prohibition.

    Open file
  • No visual on file
    Price Psychology Entry #0361

    Why a price ending in zero suits luxury

    A round number implies the price was set by authority. A precise number implies it was set by calculation. The first suits a product that is above calculation.

    Novice
    The hidden part #0361

    A round price says the seller did not haggle. A precise price says the seller calculated. Luxury cannot afford to look like it calculated.

    Open file
  • No visual on file
    Price Psychology Entry #0358

    The reason unbundling raises revenue and lowers trust

    Splitting one price into a base plus additions raises the total collected and makes comparison harder. Buyers notice the second effect and attribute it to the seller.

    Adept
    The hidden part #0358

    Comparison happens on the compared dimension. Cost moves to wherever nobody is looking, and the total arrives last.

    Open file
  • No visual on file
    Price Psychology Entry #0360

    The reason a currency without symbols raises spend

    Remove the dollar sign and the number stops feeling like money. It becomes a score, and scores are spent differently from budgets.

    Master
    The hidden part #0360

    A currency symbol is not information. It is a pain cue. Remove it and the number stays; the flinch goes.

    Open file