Circulation: Use Regression Analysis to Optimize Catalog Circ and Sales Data

Say you have customers on both the U.S. East and West coasts, but you’ve come to suspect that discount coupons offered in one area don’t generate the same sales boost found in the other. However, in our example the average sales increases in the two areas were very close, 8.84 percent and 9.17 percent, and we want to determine if it actually was the discount offer that was the driver.