A method and system for determining similar topics may include receiving user information for one or more users, the information including at least one topic and a user value for each topic, where the user value represents how strongly the user is associated with that topic. Topic information for a source topic may be generated based on the user information, the topic information including at least one user and a topic value for each user, where the topic value represents how strongly the topic is associated with that user. Similarity scores may be generated based on a topic value for each user for the source topic and a topic value for the same user for each topic in a set of topics, where each topic in the set of topics is associated with a topic value for each user. Similar topics may be selected and output.