22. Customers on the Tenure Timeline, Rather Than the Calendar Timeline Known Customer Start Known tenure when customers stop Unknown tenure for active customers (censored)
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26. Hazards Are Like An X-Ray Into Customers Peak here is for non-payment and end of initial promotion Bumpiness is due to within week variation
27. Hazards Can Show Interesting Features of the Customer Lifecycle 0% 1% 2% 3% 4% 5% 6% 7% 8% 0 30 60 90 120 150 180 210 240 270 300 330 360 390 420 450 480 510 540 570 600 630 660 690 720 750 780 810 840 870 900 930 960 990 Tenure (Days After Start) Daily Churn Hazard Peak here is for non-payment after one year Peak here is for non-payment after two years
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29. Survival is Similar to Retention Retention is jagged. It is calculated on customers who started exactly w weeks ago. Survival is smooth. It is calculated using customers who started up to w weeks ago.