Measuring Incrementality: Controlled Experiments to the Rescue!
Occam's Razor
SEPTEMBER 19, 2011
We have to do Search Engine Optimization. Then they isolated regions of the country (by city, zip, state, dma pick your fave) into test and control regions. People in the test regions will participate in our hypothesis testing. So for variation #3, no catalogs or email were sent to the customers in the test group.
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