Abstract: A system and method for assessing the risk of a listing that transforms information from the listing into variables suitable for a classifier trained to score the riskiness of listings and using the score in addition to predetermined variable constraints to determine whether a listing is fraudulent.

Abstract: A system and method for assessing the risk of a listing that transforms information from the listing into variables suitable for a classifier trained to score the riskiness of listings and using the score in addition to predetermined variable constraints to determine whether a listing is fraudulent.

Abstract: Methods, for facilitating electronic commerce using a social network, including: registering users on a social-network product-review site, wherein each user can be connected to other users by designating the other users as friends; identifying product purchases, of the users, made in merchant locations; collecting purchase details, and associated-user identities; sending a notification to an associated user requesting a user-specific product review from the associated user upon the associated user receiving the purchase details associated with the associated user; obtaining the user-specific product review and permissions from the associated user, wherein the permissions designate to share the user-specific product review and a relevant associated-user identity with associated-user friends; determining product-related information being accessed in various locations by a product-seeking user; ascertaining an identity of the product-seeking user; and presenting related-product reviews, based on the product-rel