2007 Nobel Memorial Prize in Economic Sciences
Reason for Award
for having laid the foundations of mechanism design theory
Laureates
United States of America, 
Poland
United States of America
United States of America
Explanation
When we go shopping, each person secretly knows the most they are willing to pay, but others cannot see that number. Hurwicz and his colleagues showed why making good 'rules' helps everyone cooperate. For example, an auction lets a product go to the person who values it most. Mechanism design is a subject about creating rules that make people want to tell the truth and act fairly.
Related Keywords
mechanism design
A field that designs rules or institutions backwards from desired social outcomes, taking agents’ private information and strategic behavior as given. Often called the 'reverse problem' of game theory, it has applications in economic policy, auctions, and public-good provision. The goal is to guarantee socially efficient results even when individuals pursue self-interest. Founded by Hurwicz in the 1960s and systematized by Maskin and Myerson through full implementation and optimal auctions, it now extends to algorithmic mechanism design in computer science.
incentive compatibility
A property of a mechanism whereby truth-telling is a dominant or equilibrium strategy for every participant. When satisfied, designers can elicit correct information without direct monitoring. Introduced by Hurwicz, it is exemplified by Groves mechanisms and Vickrey–Clarke–Groves auctions. Incentive compatibility often conflicts with goals like efficiency or budget balance, necessitating careful trade-off analysis. Recent work revisits the concept in multi-period models and robust mechanism design.
revelation principle
A fundamental result, generalized by Maskin and Myerson, stating that when searching for an optimal mechanism one can restrict attention to 'direct mechanisms' in which agents report their private information truthfully. This dramatically simplifies the search over the vast space of possible institutions and enables tractable analysis of optimal auctions and regulation. The principle relies on Bayesian-Nash equilibrium and has inspired extensions that incorporate reporting costs and cognitive limitations.
implementation theory
A branch that identifies conditions under which a desired social choice rule is achieved in every equilibrium of a mechanism. Maskin’s monotonicity plus no-veto power theorem is a landmark result, guiding the design of voting schemes and public-good institutions that avoid inferior equilibria. Recent work extends the framework to partial honesty, evolutionary stability, and robustness against specification errors.
asymmetric information
A situation where parties hold different pieces of private information, leading to adverse selection or moral hazard. Mechanism design offers theoretical tools to build efficient institutions even under such informational asymmetry. The concept is central to insurance, market trading, regulation, and corporate contracting, shaping the broader field of information economics.
auction theory
The study of mechanisms that allocate goods or rights through competitive bidding. Myerson’s revenue-equivalence theorem and optimal auction design form its core, applied in spectrum licensing and online ad sales. Formats include first-price, second-price, English, and Dutch auctions. Bidder risk attitudes, common-value settings, and collusion concerns are active research areas.
social welfare
An aggregate measure of individual utilities representing overall societal well-being. In mechanism design, rules are sought to maximize social welfare subject to informational and budgetary constraints. Multiple benchmarks—Pareto efficiency, Kaldor–Hicks efficiency—exist, raising trade-offs between equity and efficiency.
public goods
Goods or services that are non-rivalrous and non-excludable. Market mechanisms often fail to provide them efficiently, necessitating mechanisms incorporating taxation or voting. Frameworks include Groves–Ledyard mechanisms and club theory. Mechanism design offers ways to achieve desired provision levels while mitigating free-riding.
regulation theory
The field that designs pricing and investment rules for industries with natural monopoly or externalities under information asymmetry. Laffont–Tirole mechanisms and menu contracts induce firms to reveal true cost information. Mechanism design provides the framework that balances social welfare with firm incentives.
game theory
The mathematical study of strategic interaction among multiple decision-makers. Mechanism design is an application of game theory, employing equilibrium concepts—Nash, Bayesian, etc.—to evaluate institutional performance. Branches range from zero-sum and cooperative games to evolutionary games.