Royal Baby's Cash Value: $376M

You can't put a price on the birth of a child—unless you're the British economy, and the child is an heir to the throne. The royal baby, due in July, will bring some $376 million into Britain's retail coffers, according to a Center for Retail Research report. That's thanks to all the baby-related stuff hitting the shops, from "Pitter Patter" nail polish to royal baby showers for non-royal moms. Meanwhile, the Middleton family company, Party Pieces, is selling a new baby range.

"We didn’t experience such excitement when William was born in 1982 and certainly not when Prince Charles was born in 1948," says the editor of Majesty magazine. The CRR's director predicts that Britons "will spend three or four times" what they spent at Princes William and Harry's births. In addition to the souvenirs, there's tourism—not to mention the celebratory booze: The organization expects Brits to shell out an extra $94 million on it, the Christian Science Monitor reports. (More Kate Middleton stories.)