| 摘要 |
In one aspect, a system includes a transaction handler to process transactions, a data warehouse to store data recording the transactions, and at least one processor coupled with the data warehouse and configured to identify a first set of customers who made first transactions correlated with an advertisement, identify a second set of customers not in the first set of customers, and determine a difference between a first pattern in a first set of transactions of the first set of customers and a second pattern in a second set of transactions of the second set of customers.
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