Advertising Axioms, Part I: The Economics of Attention#

I. Advertising Is Not Art#

Think advertising is about creativity? Clever slogans and beautiful imagery? Wrong.

Advertising is economics. Pure, cold, mathematical economics. Once you understand this, you’ll never look at a billboard the same way again.

The derivation goes like this. Axiom B (bounded rationality) states that humans cannot process all available information. They have limited attention, limited memory, limited computational bandwidth. In a world of infinite products and finite attention, the gap between “products that exist” and “products that consumers know about” is enormous. That gap is an information cost.

Advertising is the tool that reduces this information cost.

That’s it. The entire discipline in one sentence. Everything else — creative briefs, focus groups, Super Bowl spots, influencer campaigns — is implementation detail. The function of advertising is to take information from the producer and deliver it to the consumer at the lowest possible cost per unit of comprehension.

If you’re spending money on advertising that doesn’t reduce information costs, you’re not advertising. You’re burning cash for entertainment.

II. The Information Cost Equation#

Worth formalizing, because precision matters.

Every transaction requires the buyer to acquire three pieces of information:

1. Existence: “This product exists.”
2. Relevance: “This product solves my problem.”
3. Trust: “This product will deliver as promised.”

Each piece of information has an acquisition cost. The buyer either discovers it on their own (high cost — searching, comparing, testing) or receives it through advertising (potentially lower cost, if the advertising is efficient).

The equation:

Advertising ROI = (Transaction value × Conversion rate) / Information delivery cost

Good advertising maximizes the numerator (high-value transactions with high conversion) and minimizes the denominator (cheap, efficient information delivery). Bad advertising does the opposite — expensive production, broad distribution, low relevance, near-zero conversion.

Most advertising is bad advertising. And the reason traces back to Axiom B: the advertisers have bounded rationality too. They don’t know exactly who needs their product, where those people are, or what message will land. So they spray and pray. They buy a Super Bowl ad and hope that among 100 million viewers, a few thousand will care.

That’s a shotgun approach to an information problem that demands a sniper rifle.

III. The Hollow-Out Method#

The first real technique: the Hollow-Out Method (减法式信息设计).

Most people assume good advertising means adding more information. More features listed. More benefits described. More reasons to buy. This is catastrophically wrong.

Axiom B tells us why: the consumer’s information processing capacity is fixed. Every additional piece of information competes with every other piece for the consumer’s limited attention. Add too much, and the consumer processes nothing. The message becomes noise.

The Hollow-Out Method inverts the logic: remove everything that isn’t essential until only the core message remains.

Think of it like sculpture. Michelangelo didn’t add marble to create David. He removed everything that wasn’t David. The masterpiece was already inside the block. He just cut away the excess.

Great advertising works the same way. Apple’s original iPod ad: “1,000 songs in your pocket.” That’s it. Not “1,000 songs in your pocket, with a 5GB hard drive, FireWire connectivity, scroll wheel navigation, and compatibility with Mac OS X.” Just: 1,000 songs. Your pocket. Done.

The information cost to the consumer was near zero. Five words. Instant comprehension. Immediate relevance. The ad didn’t try to educate the consumer about hard drive technology. It communicated the single thing that mattered and trusted the consumer’s bounded rationality to fill in the rest.

The Hollow-Out Method in practice:

1. List everything you could say about your product. Every feature, benefit, specification.
2. Rank by relevance to the target buyer’s core problem.
3. Keep only the top 1–2 items. Delete everything else.
4. Express the remaining items in the simplest possible language. No jargon. No abstraction. Concrete, sensory, immediate.
5. Test: Can a stranger understand the ad in under 3 seconds? If not, hollow out more.

This feels counterintuitive. You’ve spent months building a product with dozens of features. You want to show them all off. Resist that urge. Your product’s features don’t matter to the consumer — the consumer’s problem matters to the consumer. Speak to the problem. One problem. One solution. One message.

IV. Precision Targeting: The Sniper’s Art#

The second technique: precision targeting.

Remember the information cost equation? The denominator is “information delivery cost.” The cheapest way to deliver information is to deliver it only to people who need it.

Sounds obvious. It’s not. For most of advertising history, precision targeting was impossible. You bought a newspaper ad, and it went to every subscriber — the 2% who might care and the 98% who definitely didn’t. You bought a TV spot, and it played for everyone watching that channel, regardless of whether they were in your market.

The waste was staggering. And structural — baked into the medium. You couldn’t target because the medium didn’t allow it.

The internet changed this. Digital advertising platforms — for all their flaws — enable targeting at a resolution that would have seemed like science fiction to a 1980s ad executive. You can target by age, location, income, interests, browsing history, purchase behavior, life events. You can show a baby stroller ad only to people who recently searched for prenatal vitamins. The information delivery cost drops by orders of magnitude.

But most people confuse targeting capability with targeting strategy.

Having access to a sniper rifle doesn’t make you a sniper. You still need to know where to aim.

The Precision Targeting Framework:

Step 1: Define the Ideal Transaction. Who is the buyer? What’s their problem? What’s their budget? What’s their decision timeline? Be ruthlessly specific. “Women aged 25–45” is not a target. “First-time mothers in tier-2 cities who are researching baby formula and have a household income above $40K” is a target.

Step 2: Map the Information Gap. What does this buyer already know? What don’t they know? What wrong beliefs do they hold? Your ad needs to bridge the gap between “what they currently believe” and “what they need to believe to make a purchase.” If they already know your product exists, don’t waste money on awareness ads. If they know it exists but don’t trust it, focus on trust signals.

Step 3: Choose the Minimum Viable Channel. What’s the cheapest channel that reaches your target buyer at the moment they’re most receptive? This is not always the biggest channel. A niche forum with 10,000 highly relevant members might outperform a Facebook campaign reaching 10 million irrelevant eyeballs. Cost per relevant impression is what matters, not cost per impression.

Step 4: Measure ruthlessly. Every ad dollar should be traceable to a transaction outcome. If you can’t measure it, you can’t optimize it. If you can’t optimize it, you’re guessing. And guessing is the most expensive thing a bounded-rationality agent can do.

V. The Axiom Integration#

Both techniques trace back to the tower.

The Hollow-Out Method is a direct response to Axiom B. Consumers have bounded rationality. They can’t process complex messages. Therefore, reduce message complexity to the absolute minimum. The less information you transmit, the higher the probability it gets received and processed correctly.

Precision Targeting is a direct response to the intersection of Axiom A and Axiom B. Axiom A says transactions should increase (dT>0). Axiom B says information costs prevent many transactions from happening. Precision targeting reduces information costs for the specific transactions most likely to occur, thereby accelerating dT>0 at the margin where it matters most.

Together, they form a complete advertising methodology:

• Hollow-Out answers: “What should I say?”
• Precision Targeting answers: “Who should I say it to?”

Get both right, and your advertising becomes a transaction-creation machine. Get either one wrong, and you’re subsidizing the media industry’s profits with zero return.

VI. The Amateur’s Mistake#

The most common mistake — and it’s everywhere — is treating advertising as a cost center rather than an investment with measurable returns.

“We need to build brand awareness.” No. You need to generate transactions. Brand awareness is a means to that end, not an end in itself. If your brand awareness campaign doesn’t eventually convert to transactions, it’s not brand building — it’s vanity spending.

“We need to go viral.” No. You need to reach the right people with the right message. A video that gets 10 million views and zero sales is not a successful ad. A targeted email that reaches 500 people and converts 50 is.

“Our competitor is spending $X on ads, so we need to match them.” No. Your competitor might be burning money on shotgun advertising because they don’t understand precision targeting. Matching their waste is not a strategy — it’s synchronized drowning.

Every advertising decision should pass one test: does this reduce the information cost between my product and the people most likely to buy it?

If yes, spend more. If no, stop immediately.

The axioms don’t care about your creative awards. They care about transactions. So should you.