The case of cross-selling

In the supermarket, there is an interesting phenomenon: diapers and beer are sold together. But this strange move has increased the sales of diapers and beer. This is not a joke, but a real case of Wal-Mart supermarket chain in the United States, which has always been talked about by merchants. It turns out that American women often tell their husbands to buy diapers for their children after work After buying diapers, my husband has to buy back his favorite beer, so there are still many opportunities to buy beer and diapers together. What made Wal-Mart discover the relationship between diapers and beer? It is the merchants who discovered this magical combination through detailed data analysis of the original transaction figures of the supermarket for more than a year.