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January 14th, 2014, 09:27 AM  #1 
Newbie Joined: Jan 2014 Posts: 2 Thanks: 0  Stats  subscription renewal rates
Hello, I have the following problem: 1. a magazine gains 1 subscriber per day 2. the subscriptions are renewed on a monthly basis 3. each subscriber is 90% likely to continue their subscription from one month to the next Please could you tell me how to predict how many subscribers there will be after x months? Thank you for your help, mnbv 
January 14th, 2014, 11:23 AM  #2 
Member Joined: Dec 2013 Posts: 82 Thanks: 0  Re: Stats  subscription renewal rates
This would be a linear recurrence sequence. If we assume 30 days in each month. Find the closed form: Obviously you won't get fractions of people but this would be a good approximation. 
January 14th, 2014, 04:20 PM  #3 
Newbie Joined: Jan 2014 Posts: 2 Thanks: 0  Re: Stats  subscription renewal rates
Hi Slinkey, Thank you 
January 15th, 2014, 02:12 AM  #4 
Member Joined: Dec 2013 Posts: 82 Thanks: 0  Re: Stats  subscription renewal rates
You're welcome. 

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