The present invention relates to a method and system for evaluating the cause and effect of advertising and marketing programs using card transaction data. In one embodiment, access is provided to voluminous card-holder transaction data detailing accurate-to-the-penny transaction amounts, twenty-four hour active customers, and a multi-year transaction history per customer. Furthermore, such data is captured in real-time, and due to the sample size, can provide granular, statistically significant information at a local level for client and merchant coverage.