It's 2006, back in the stone ages. Gnarls Barkley sang "Crazy" and the song ended up being the top ranked song of the year. You could get a loan for a home by breathing on a mirror to demonstrate condensation. Amazon was becoming a force.
My team at Nordstrom had massive catalog mail/holdout tests. If our circulation was 2,000,000 catalogs, we held out 200,000 customers. Yeah, 200,000! This allowed us to measure lift at a segment level.
We also had a proprietary credit division at Nordstrom. This meant that if a customer purchased at Amazon (or Neiman Marcus or Target or your local gas station) using our credit card, we could attribute purchases to our mail/holdout test.
Yeah, that's good stuff!
So good, in fact, that we learned the following fact.
- For every incremental $1.00 we generated at Nordstrom from mailing a catalog, we drove $0.20 to Amazon.