Abstract: A computing system for searching for and identifying data repository deficits includes an interactive database of items, a data repository that stores a first type of information related to items, a search engine configured to identify items that do not have an amount of the first type of information that meets a first threshold, a candidate selection interface that provides functionality for the user to select an item from recommended candidate items needing the first type of information, a user interface via which the user can provide the first type of information for an item selected by the user, a game system configured to calculate for a game scores and rankings based at least in part on data stored in the data repository.

Abstract: A system includes an interactive item catalog and a data repository that stores purchase histories for users, first reviews for items submitted by users, and first review helpfulness scores. A search engine system identifies catalog items that do not have reviews from users. The system includes a user interface that enables the user to select an item identified by the search engine system as not having user reviews. The systems includes review entry user interface via which the user can enter a first review for an item selected by the user. A game system is configured to calculate for a first review game first review scores and first review rankings for users based at least in part on data stored in the data repository and the first review scores. The system includes an interface configured to provide information to users related to their first review scores and rankings.

Abstract: A computing system for searching for and identifying data repository deficits includes an interactive database of items, a data repository that stores a first type of information related to items, a search engine configured to identify items that do not have an amount of the first type of information that meets a first threshold, a candidate selection interface that provides functionality for the user to select an item from recommended candidate items needing the first type of information, a user interface via which the user can provide the first type of information for an item selected by the user, a game system configured to calculate for a game scores and rankings based at least in part on data stored in the data repository.