TIMi top winner at the PAKDD 2007 The PAKDD2007 is the 11th Pacific-Asia Knowledge Discovery and Data Mining conference. These results were published the 1st may 2007. Problem description: Cross-Selling: Credit Card 2 Mortgage. We try to sell a “mortage” to customers that already have a “credit card”. Difficulty: Target is small: 1.71% Data: 40,700