What it means
Most economic analysis takes the rules as given and predicts what people do. Mechanism design flips the question.
A designer wants a result, such as selling an asset at a fair price or sharing costs fairly, and must choose rules so that people acting in their own interest still deliver it. The central difficulty is that people hold private information.
A bidder knows what an item is worth to them, an employee knows how hard they are working, and a supplier knows its true costs. A well-designed mechanism gives each person a reason to reveal the truth, a property known as incentive compatibility.
A classic example is the sealed-bid second-price auction, sometimes called a Vickrey auction. The highest bidder wins but pays the second-highest bid, so bidding your true value is the best strategy.
Bidding lower risks losing something you value, and bidding higher risks paying more than it is worth to you. The ideas are used well beyond auctions.
Governments use them to allocate radio spectrum, companies use them to design sales commission plans and procurement tenders, and online platforms use them to match buyers to sellers or to run advertising auctions. Contracts, bonuses and transfer pricing rules can all be seen as mechanisms for aligning private incentives with company goals.
The work of Leonid Hurwicz, Eric Maskin and Roger Myerson on the subject was recognised with the Nobel prize in economics in 2007. For a manager the practical lesson is that incentives shape behaviour, and a poorly designed rule will be gamed, so every bonus or tender should be tested by asking how a self-interested person would respond.
A useful test when designing any scheme is to ask three questions. What does each person know that the designer does not, what would a self-interested person do under the rule as written, and would the company be happy with that behaviour?
If the answer to the last question is no, the rule needs changing before it goes live.
In practice
Real-world examples.
Example
A company runs a tender to buy raw materials from five suppliers. It uses a rule where the lowest bidder wins but is paid the second-lowest price. Suppliers have little reason to understate their real costs, and the buyer sees more honest bids. Over several rounds the procurement team learns what each supplier genuinely needs to earn.
Example
A sales director redesigns the commission plan because reps are holding back deals to hit next quarter's target. She introduces a plan that rewards annual performance with smooth accelerators and no cliff at quarter-end. Deals are now logged when they close rather than when they best suit a rep's bonus. Forecasts become more reliable as a result.
Example
A city sells the right to run a ferry service through an auction instead of picking a company directly. Bidders compete on the subsidy they need, which reveals the true cost of the service. The city selects the lowest subsidy and saves public money. The result is also easier to defend to taxpayers.
Case study
Seen in the real world.
Brightfield Logistics is an illustrative, fictional delivery firm that paid its drivers a bonus for the fewest late deliveries. Within months the reported lateness fell, but customer complaints rose.
The operations team found that drivers were marking parcels as delivered before they had arrived, so that the timestamp met the target. The rule rewarded the report rather than the real outcome, and the drivers, who knew the truth, had every reason to hide it.
Nobody had cheated in the sense of breaking a rule, which is why the problem took so long to find. The company redesigned the scheme so that the bonus depended on delivery confirmations from customers, which drivers could not fake. Late reports and complaints both fell. The illustrative lesson is that a rule must be tested against how people can exploit it.
Watch out
Common mistakes.
- Assuming people will follow the spirit of a rule, when they will usually respond to its incentives as written.
- Designing a bonus around a measure that the person being measured controls and can manipulate.
- Believing the best mechanism is always the most complicated, when simple rules that people understand often work better.
Questions
People also ask.
What is incentive compatibility?
It means the rules are set so that telling the truth or acting honestly is each person's best strategy.
Is mechanism design the same as game theory?
It is closely related, but game theory analyses outcomes under given rules while mechanism design chooses the rules to achieve a goal.
Where is it used in business?
It appears in auction design, procurement tenders, pricing rules, bonus schemes and the matching systems of online marketplaces.
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