8. A system, comprising: a distributed computing environment, comprising: a server comprising one or more hardware processors and memory, and configured to provide a network-based interface for viewing product descriptions; and one or more computing devices comprising one or more hardware processors and memory, and configured to implement a value analyzer and a quality analyzer, wherein the value analyzer is configured to: receive via a network connection to the one or more computers implementing the value analyzer, a plurality of submissions from a plurality of entities, wherein the plurality of submissions each comprise a textual description of an attribute of a product; match a set of the plurality of submissions such that the submission in the set of matched submissions each include textual descriptions of a same product; perform a similarity comparison for each submission of the set of matched submissions, wherein to perform the similarity comparison the value analyzer is configured to: compare a particular submission of the set of matched submissions to a plurality of other submissions of the set of matched submissions; and determine a plurality of data quality scores for the particular submission, wherein each data quality score of the plurality of data quality scores is based on a measure of similarity between the textual description of the attribute of the product included in the particular submission and a textual description of the attribute of the product included in a respective one of the other submissions of the set of matched submissions; calculate, based on the plurality of data quality scores, a calculated data quality score for the quality of the textual description of the attribute of the product included in the submission, wherein the particular submission is from a particular entity of the plurality of entities; wherein the quality analyzer is configured to: rate the particular entity based, at least in part, on the calculated data quality score of the textual description submitted from the particular entity, wherein to rate the particular entity t, the quality analyzer is configured to: combine the calculated data quality score with one or more previously calculated data quality scores of textual descriptions in submissions previously received from the same particular entity to determine a cumulative data quality score of textual descriptions in submissions received from the same particular entity, wherein the particular entity is distinct from the other entities of the plurality of entities; and assign a rating to the particular entity, wherein the rating indicates the particular entity's propensity to provide quality product descriptions.
8. A system, comprising: a distributed computing environment, comprising: a server comprising one or more hardware processors and memory, and configured to provide a network-based interface for viewing product descriptions; and one or more computing devices comprising one or more hardware processors and memory, and configured to implement a value analyzer and a quality analyzer, wherein the value analyzer is configured to: receive via a network connection to the one or more computers implementing the value analyzer, a plurality of submissions from a plurality of entities, wherein the plurality of submissions each comprise a textual description of an attribute of a product; match a set of the plurality of submissions such that the submission in the set of matched submissions each include textual descriptions of a same product; perform a similarity comparison for each submission of the set of matched submissions, wherein to perform the similarity comparison the value analyzer is configured to: compare a particular submission of the set of matched submissions to a plurality of other submissions of the set of matched submissions; and determine a plurality of data quality scores for the particular submission, wherein each data quality score of the plurality of data quality scores is based on a measure of similarity between the textual description of the attribute of the product included in the particular submission and a textual description of the attribute of the product included in a respective one of the other submissions of the set of matched submissions; calculate, based on the plurality of data quality scores, a calculated data quality score for the quality of the textual description of the attribute of the product included in the submission, wherein the particular submission is from a particular entity of the plurality of entities; wherein the quality analyzer is configured to: rate the particular entity based, at least in part, on the calculated data quality score of the textual description submitted from the particular entity, wherein to rate the particular entity t, the quality analyzer is configured to: combine the calculated data quality score with one or more previously calculated data quality scores of textual descriptions in submissions previously received from the same particular entity to determine a cumulative data quality score of textual descriptions in submissions received from the same particular entity, wherein the particular entity is distinct from the other entities of the plurality of entities; and assign a rating to the particular entity, wherein the rating indicates the particular entity's propensity to provide quality product descriptions. 12. The system of claim 8 , wherein the one or more previously determined quality scores of textual descriptions correspond to a selected product category.