Jim answers more questions from fellow Drillers
Want to see additional questions & answers from fellow Drillers?
Here’s the blog archive; the pre-blog email newsletter archives are here.
Q: I am a big fan of your web site and read your Drilling Down book. Great work!
A: Thanks for the kind words!
Q: I was wondering if you could help me picking the right control group size for a project of ours? The population is 25 million telco customers that for which we want to do a long term impact analysis (month by month) in regards to revenue increase versus control group. The marketing initiatives are mix of retention, lifecycle and tactical/seasonal activities. We want to measure revenue increase through any of the marketing activities compared to control group.
A: Great project, this is the kind of idea that can really improve margins if you can find out which specific tactics drop the most profit to the bottom line.
Q: I have searched the web for some help and found calculators that say: On 25 million and smallest expected uplift of 0.1% and highest likely rate of > 5% the calculator gives 250k (1%). Is that sufficient to calculate the net impact on the remaining base? Would be very grateful if you could give me your thoughts.
AÂ Well, it could be and might not be…
Continue reading Choosing the Size of Control Groups