Incentives: Follow the Reward
Don't watch what people say. Watch what pays them.
“Show me the incentive and I’ll show you the outcome.” People and systems drift toward whatever is rewarded — so to predict behavior, find the reward, not the stated intention. The single most reliable lever for explaining why people do what they do.
In 1902, French colonial officials in Hanoi had a rat problem, so they did the obvious thing: they paid a bounty for every rat tail handed in. Tails poured in by the thousands. The rat population grew. It turned out enterprising locals had started farming rats — breeding them, snipping the tails for the bounty, and releasing the now-tailless rats to breed some more. The officials thought they were paying to kill rats. They were actually paying for tails, and people gave them exactly, precisely that. This is the most important and most under-used idea in all of human behavior: people do what they are rewarded for doing — not what you hoped, not what you said, not what they themselves claim to value, but what actually pays.
Charlie Munger, who built a fortune partly by taking this idea more seriously than almost anyone, put it as bluntly as it can be put: “Show me the incentive and I will show you the outcome.” He called incentives so powerful that he was “ashamed” of how often he still underestimated them. That’s the trap this course disarms. We think we explain behavior with character, values, and intentions — “she’s lazy,” “he’s greedy,” “they just don’t care” — when the far better predictor is usually sitting in plain sight: what is the payoff? Change the payoff and you change the behavior, often overnight, no change of heart required.
This course takes that one sentence and turns it into a lens you can’t switch off. You’ll learn what an incentive actually is (anything that changes the payoff of a behavior), why smart honest people unconsciously rationalize whatever pays them (incentive-caused bias), how rewarding a convenient proxy instead of the real goal manufactures the exact gaming you were trying to prevent (the cobra effect, and Goodhart’s law in one line: when a measure becomes a target, it stops being a good measure), why dangling cash can sometimes destroy the motivation it was meant to buy (crowding-out), and finally how to design incentives that pull toward the outcome you actually want. We’ll work real payoff tables, drive an interactive slider that makes a whole population defect to gaming as the reward climbs, and name the failure mode every step of the way. It assumes only the one foundation — that a mental model is a portable thinking tool — and builds from there. By the end, you’ll have a reflex that most people never develop: before judging anyone’s behavior, you’ll ask what is this person being paid to do? — and you’ll usually have your answer.
In this topic
- 1 Show Me the Incentive People do what they're rewarded for — not what you hoped, said, or believe they value. This lesson installs the lens and tours the whole course in one sitting, from the Hanoi rat farms to designing incentives that actually work. 6 min
- 2 What an Incentive Actually Is An incentive is anything that changes the payoff of a behavior — carrot or stick, money or status, designed or accidental. Here we make the word precise enough to use as a tool, from commission math to the management maxim that quietly sets a trap. 9 min
- 3 Incentive-Caused Bias People don't just respond to incentives — they sincerely come to believe whatever pays them. This is the subtle, dangerous cousin of 'show me the incentive': honest reasoning quietly bent by a reward, and why the smartest, most upright people fall hardest. 9 min
- 4 Perverse Incentives & the Cobra Effect Reward a proxy instead of the real goal and you manufacture the exact gaming you feared — bred cobras, farmed rats, fake bank accounts, and Goodhart's law. Drive an interactive slider that makes a whole population defect to cheating as the reward climbs. 11 min
- 5 Intrinsic vs. Extrinsic: When Pay Backfires Sometimes paying for a behavior makes people do it less. A daycare fined late parents and got twice as many — because a fine is a price, and money can quietly destroy the moral and intrinsic motives it was meant to reinforce. 9 min
- 6 Designing Good Incentives The constructive payoff: turn the whole course into design rules. Reward the outcome not the proxy, give the agent skin in the game, pre-mortem the gaming, and pair metrics with guardrails — with the FedEx night-shift fix as the worked example. 9 min
- 7 Final Exam: Incentives A graded, one-way final exam on incentives — what an incentive is, extrinsic vs intrinsic, incentive-caused bias, perverse incentives and the cobra effect, Goodhart's law, crowding-out, and designing incentives that aim at the outcome. Pass mark 70%. 20 min
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