It used to be that you bought clothes, hung them in your closet and wore them a number of times (or didn’t). Eventually they either got donated to a charity or thrown in the trash. But things are changing quickly, as fashion re-commerce — renting, reselling, thrifting — becomes a bigger part of the retail industry. And the fashion resale market has been expanding a breathtaking 21 times faster than traditional retail over the past three years. This fascinating article from Knowledge@Wharton provides all the details.