About three years ago, U.S. Squash made a drastic change to its junior ranking system: Instead of being determined by an algorithm that evaluated the probabilities of matches between competitors, they now base rank on the number of points players earn at a tournament.

WSJ: How Squash Got Serious

Roth, aided by a Harvard graduate student and a young economist at Columbia, redesigned the system using a version of what's known as a deferred-acceptance algorithm.

FORBES: Magazine Article

Roth has used modified forms of this same algorithm to design matching systems for Boston's public school system and for placing medical school graduates with residency programs.

FORBES: Magazine Article

Health Data Insights helps health care payers cut back on overcharges via a sophisticated algorithm-based system that flags likely errors and brings them to the attention of trained technicians.

FORBES: HealthDataInsights Sells for $400 Million. Big Win for GRP Partners.

At Smashwords, up until January of this year, our algorithm for best sellers just looked at absolute downloads, but authors gamed that system by offering discounted or free books using the Smashwords coupon tool.

FORBES: Mark Coker: Indie Authors Are Underpricing Their Books