"Economic development" is starting to reach into New York City's subways.  Small independent retail, barbershops, shoe shine stands, flower shops and others are being replaced by national chain stores and restaurants.  In the process, the visual geography of the subway -- the scale and colors and lighting and composition of retail -- is being transformed.  This is true both for the riders being moved around the system, and the retail workers and small shop owners, who stay put, often in small boxes of space.