" " Some home owners will rent office space to more than person at the same time. "Most great ideas sound absurd at first," says Alex Stephany, a London-based sharing economy expert and author of "The Business of Sharing." There's no doubt that the sharing economy has captured the hearts and minds (and wallets) of Americans — more specifically college-educated, young, affluent, city-dwelling Americans. But there's a definite "sharing gap" — participation in the sharing economy is markedly higher in college-educated people under 45 who live in urban areas. As with Airbnb, hosts must specify when their apartment is available as office space and establish a system for handing off the key.