Planet Money T-shirt

The business that transformed the nation is the product of an obscure but hugely influential trade deal — and a cultural struggle over Korean food.

Clothes donated to charity in the U.S. often wind up for sale in African markets. Here's the story of one shirt that started out at a bat mitzvah in Michigan and wound up in a market in Nairobi.

The book lists the tax that importers have to pay on approximately every single thing in the universe — and raises a key question about the Planet Money T-shirt.

Colombia's economy has been growing, and wages have been rising. That's good for the country as a whole, but it may wind up driving away the T-shirt industry.