Periodic antitrust attacks on corporations may have influenced stock prices. For the period 1904 to 1944, each antitrust case filed is associated with a 0.5 to 1.9 percent drop of the Dow and each unexpected case with even larger drops. Other aspects of antitrust besides actual filings may help...

"Open access" would allow ISPs to use a cable operator's broadband connection under regulated terms and conditions. Advocates stress the desirability of an "end-to-end" architecture for the Internet and the danger that cable operators will use their control over the last mile to limit consumer...

Do related markets reflect new information simultaneously? For high-yield bonds, a large abnormal price decline in a corporation's most liquid bond over a month is followed by an average abnormal stock price decline of −1.42%. This effect is larger for stocks that have increased in value and...