In selected embodiments a repository system correlates user browsing behavior with in-store transactions involving a number of products or product categories. For example, an online portal may receive online transactional data and in-store transactional data and associate particular user identities with such data. The user identities may be correlated by matching online transactional data with in-store transactional data. This correlation identifies a user known to frequent both online and in-store venues of the same retailer. The online portal may maintain browser repository records based on an association of online and in-store identities. In some implementations, the portal measures in-store transactions of a user known to frequent both online and in-store venues. The measurements may be performed for a predetermined time period. Such measurements may be used to extrapolate web influenced in-store transactional data from at least one browser repository record to estimate a transaction for an unknown user.