Glossary · Game Theory
Mechanism Design
also: reverse game theory · market design · mechanism-design theory
Definition
Mechanism design is game theory run in reverse: instead of predicting behaviour inside a given set of rules, it designs the rules so that self-interested participants produce the outcome the designer wants. Hurwicz, Maskin, and Myerson shared the 2007 Nobel for the field. Auctions, reputation systems, and matching markets are its applied surface in digital products.
The designer chooses a game, participants play it with private information the designer cannot see, and the question is which outcomes can be implemented at all. The revelation principle collapses the search to direct mechanisms in which participants report their private information and truth-telling is an equilibrium. Vickrey, Clarke, and Groves showed efficient allocation is implementable in dominant strategies; Myerson (1981) characterized the revenue-maximizing auction; Roth's work on kidney exchange and school choice showed the same tools redesign markets without prices. For product teams the shift in posture matters more than the theorems: ratings, ranking algorithms, referral bonuses, and cancellation flows are mechanisms, and users will play them strategically whether or not the team modelled that.
Essays on this concept
- Game Theory
Mechanism Design for Marketplaces: Incentive Compatibility as a Product Requirement
Ratings, reviews, rankings, and fees are mechanisms, and users play them. eBay feedback ran 99.3% positive while 3.39% of sales went bad. Incentive compatibility is the test, and it belongs in the spec.
- Game Theory
Auction Theory for Ad Buyers: What the Death of Second-Price Means for Bidding
Media buyers learned to bid their true value in a second-price world. Programmatic display switched to first-price in 2019, and search was never truthful. The mechanism decides who keeps the margin.
- Digital Economics
Two-Sided Network Effects Are Dead, The Rise of Multi-Sided Algorithmic Marketplaces
The textbook model of two-sided markets, more buyers attract more sellers attract more buyers, is a relic. The platforms that win today run on algorithmic matching, not network density. The implications for defensibility are profound.
- Marketing Strategy
Principal-Agent Problems Inside the Growth Organization: Incentive Design for Sales, Agencies, and Attribution
A growth organization is a stack of principal-agent contracts: CMO to sales, company to agency, team to attribution model. All three fail the same three ways, and the fixes are contract design, not culture.
- Game Theory
Bayesian Persuasion and the Economics of Disclosure: Reviews, Ratings, and Price Transparency
Disclosure theory says silence should unravel into full transparency. In practice it does not: buyers under-read silence, so star averages, review order, and hidden fees become information design.
- Digital Economics
The Micro-Economics of API Pricing: Marginal Cost, Value Capture, and Developer Elasticity
An API call costs fractions of a cent to serve but can generate thousands in downstream value. The gap between marginal cost and captured value is where the entire API economy lives, and most companies price this gap wrong.
Related concepts
Authoritative references