After almost two decades in which antitrust policy had veered sharply toward less-is-more, the rules changed in the late 1990s. The Justice Department decided to challenge the practices of successful service enterprises in credit cards (Visa/MasterCard), airlines (American), and software (Microsoft).
 

Did these interventions signal a return to policies in which Washington second-guesses market outcomes rather than allowing these markets to respond on their own? Or were the Clinton years a last hurrah for aggressive trustbusting? Experts will discuss the three high profile cases and assess the future of antitrust policy.