How Visa, Using Card Fees, Dominates a Market

By ANDREW MARTIN

Published: January 4, 2010

Every day, millions of Americans stand at store checkout counters and make a seemingly random decision: after swiping their debit card, they choose whether to punch in a code, or to sign their name.

It is a pointless distinction to most consumers, since the price is the same either way. But behind the scenes, billions of dollars are at stake.