A computer-implemented method for associating a merchant with an aggregate merchant uses a computing device having a processor and a memory. The method includes identifying an association rule for the aggregate merchant, including one or more antecedents. Each antecedent includes a model value for the antecedent associated with the aggregate merchant. The method also includes identifying one or more merchant data values associated with the merchant. Each of the one or more merchant data values correspond to one of the one or more antecedents. The method further includes applying the association rule to the one or more merchant data values by comparing the model value for each antecedent with a merchant data value associated with the corresponding antecedent, thereby generating a confidence score for the merchant. The confidence score represents a likelihood the merchant is associated with the aggregate merchant. The method also includes outputting the confidence score.